Category Archives: Security Products

Tanner Selected as Exclusive Master Distributor for Parker Lock-Out® Maximum Security Screws


Tanner Bolt & Nut Inc. of Brooklyn, NY is pleased to announce an agreement has been reached with Parker Fasteners of Buckeye, AZ to become the Exclusive Master Distributor in the United States for its Lock-Out® Maximum Security Screws.img_lock-out-max-security-screws

Lock-Out® is a new and innovative security fastener featuring a unique patented drive that is engineered to perform in high torque applications. The distinctive oval center pin and multiple drive/key combinations give customers the option to select higher levels of security in a tamper-proof fastener. Installation bits are not sold commercially. Installation bits will only be sold through Tanner.img_lock-out-screw-group-1

Lock-Out® is available in a multitude of head styles, threads, diameters, lengths, materials, and finishes. Diameters range from 1/4″-5/8″, M1.4-M16, and #0-#10, with lengths up to 12″ for certain diameters. Materials available include carbon steel, stainless steel 302HQ, 304, 316, A286 & brass alloy steel 4037, 8740.

For absolute maximum protection of your property or product, Lock-Out® can be manufactured with a one-of-a-kind, drive pattern that is exclusive to your company.

Tanner will receive its initial stock order in early March 2021 and will continue to bolster its inventory throughout the year. Made-to-order products typically will ship in 8-10 weeks.

Tanner, headquartered in Brooklyn, NY is a nationwide distributor of premium industrial and security fasteners, code-compliant anchors, safety products, and power tool accessories. For over 40 years, Tanner’s knowledgeable sales and support staff has committed to a customer-first approach, delivering innovative quality products. Tanner partners with over fifty well-known quality brands that provide our customers with industry-leading experience, innovation, and quality control.

Parker Fasteners is a premier ISO & AS9100 Rev D registered cold heading manufacturer located in Buckeye, Arizona who sources all raw materials from American sources, including DFARS compliance. Parker takes great pride in making quality fasteners, meeting customer product specifications, and delivering on or before promised due dates. Parker brings a unique depth of experience and a high level of innovation to its product offering, delivering the highest level of support in the industry in this high growth area.

Lock-Out® Maximum Security Screw Product Information & Specs:img_lock-out-pdf-preview

Please Reach Out to Our Lead Security Specialist, Gil to Discuss Your Next Security Project

Gil Dagoberto
Security Fastener Specialist

Security Fasteners & Tamper Proof Screws


Tanner Bolt & Nut Corp. features five types of security fasteners with unique drive configurations, each available in different head styles and materials. Security fasteners are cap screws, machine screws, self-drilling screws,concrete screws, sheet metal screws, nuts or bolts manufactured with a tamper proof or tamper resistant drive or head style. Installation tools are available.

The theory behind tamper-resistant fasteners is to make a fastener whose loosening requires a tool that a tamperer is unlikely to have on hand at the time of opportunity for tampering. There is no expectation that it will be impossible for a tamperer to obtain the driver. Rather, the main idea is simply that most tamperers will not bother to seek out and obtain a driver. In the cases of vandalism prevention and theft prevention, since most vandalism and theft incidents are simply crimes of easy opportunity, the idea is to “raise the bar” and make the opportunity less convenient.

A tamper proof fastener takes the theory one notch further. Some tamper proof screws require a tool that is proprietary and can only be obtained with the purchaser submitting documentation as to its intended use. Others can be installed with standard wrenches, but when tightened to a specific torque head shears off, leaving a conical, round, or flat head design that completely protects your property.

Continue reading Security Fasteners & Tamper Proof Screws

Stop Theft, Tampering & Vandalism – Secure Your Assets with Tanner

Let Tanner be Your Security Product SpecialistTrust Tanner Security

Tanner has been providing customers with the assistance, guidance & products necessary to secure their valuable assets and property for the past 30 years. Our customers come from a wide variety of industries and require high quality tamper-resistant fasteners, sealants and anchoring systems.

With years of product knowledge and experience, Tanner is always ready to take on the next security challenge that our customers present us. Here at Tanner our main goal is to leave our customers satisfied with the end result and we are more than confident we can solve all your security product needs.

We encourage you to reach out to our security specialist – Gil – to discuss any security applications or projects you may have.

Cell: 646-302-0499 or Email:

Problem Solving with Tanner

Bike Problem SolutionProblem:

A Bike Sharing Company was having an issue with people tampering with exposed components on both their public bike racks & bikes.

This was costing them time and money due to the extra work, repairs, down time and staff resources.


Tanner was able to develop various levels of tamper-resistant drives to prevent this unwanted tampering.

This solution utilized both existing & custom security drives.



OEM of Bicycle Docking Stations wanted to prevent internal components from loosing and causing parts & systems to fail.

Additional resources, replacement of hardware & elements was becoming too costly & time consuming to absorb.


Tanner was able to come up with a specialized fastener that featured an adhesive that was added to the threads of the fastener to prevent loosening.

This virtually eliminated missing, failing components & equipment downtime.

Shop Tanner for All Your Security Product Needs


Adhesives & Sealants for Work & Security

Wide Variety of Adhesives & Sealant Available

Adhesives & Sealants come in a wide variety styles, each with it’s own specific applications and uses. General purpose for everyday use, heavy duty anchoring systems for industrial applications and tamper resistant compounds used for security reasons. With the growing number of adhesives & sealants out there, it can be easy to mistakenly use one of these for the wrong use. Read on to learn more about some of these adhesives & sealants that Tanner has to offer its customers and learn more about the specific uses and applications they were made for.

Security Sealants

DynaPoxy™ EP-1200DynaPoxy EP-1200

“Pick-Proof” Rigid, Two-Part, Epoxy Resin Compound

DynaPoxy™ EP-1200 is a “pick-proof” rigid, two-part, epoxy resin compound. It has been specially designed to be an excellent joint sealant for high security areas of prisons and other security areas. DynaPoxy™ EP-1200 can also be used as a structural adhesive for vertical & overhead bonding, grouting and for bolt embedment, due to its high compressive strength and non-sag properties. It is packaged in a 1-1/2 gallon unit including the Base and Activator. Color Packs are available separately for purchase.

  • Outstanding adhesion to similar or dissimilar materials, particularly in concrete and metal.
  • Use in high security areas where a harder material is required and flexibility is less important.

DynaFlex™ SC

Tamper-Resistant, One-Part, Non-Sag Elastometric STPU

DynaFlex™ SC is a tamper resistant security sealant. DynaFlex™ SC is more flexible than epoxy in composition and is designed to achieve high tensile and tear strengths, abrasion resistance and an average ultimate hardness of at least 55, yet withstand 25% total joint movement. This is a unique one-part, non-sag, tamper-resistant elastometric STPU joint sealant with many of the strengths of two-component security sealants but with the user-friendly ease-of application properties of a one component sealant.DynaFlex SC

  • This rugged but flexible sealant is ideally suited for use in institutional and correctional complex security installations.
  • Performs equally well in other public buildings and facilities where ordinary sealants are easily damaged or torn out by tampering and acts of vandalism.

Heavy Duty Adhesive Anchoring Systems


Two-Component, Acrylic Injection Adhesive Anchoring SystemAC200+

The AC200+ is a two-component, high strength adhesive anchoring system. The system includes injection adhesive in plastic cartridges, mixing nozzles, dispensing tools and hole cleaning equipment. The AC200+ is designed for bonding threaded rod and reinforcing bar hardware into drilled holes in concrete base materials.

  • Code Listed: ICC-ES ESR-4027 for cracked and uncracked concrete
  • Evaluated and recognized for freeze/thaw performance
  • Cartridge design allows for multiple uses using extra mixing nozzles
  • Mixing nozzles proportion adhesive and provide simple delivery method into drilled holes
  • Evaluated and recognized for long term and short term loading


Two-Component, Epoxy Adhesive Anchoring SystemPure 110+

The Pure110+ is a two-component, high strength adhesive anchoring system. The system includes injection adhesive in plastic cartridges, mixing nozzles, dispensing tools and hole cleaning equipment. The Pure110+ is designed for bonding threaded rod and reinforcing bar hardware into drilled holes in concrete and masonry base materials. Pure110+ has the same bond strength at room temperature and at 110°F.

  • Code Listed: ICC-ES ESR-3298 for cracked and uncracked concrete
  • Evaluated and recognized for freeze/thaw performance
  • Cartridge design allows for multiple uses using extra mixing nozzles
  • Mixing nozzles proportion adhesive and provide simple delivery method into drilled holes
  • Evaluated and recognized for long term and short term loading
  • Same bond strength at room temperature and at 110ºF.

AC100+ Gold

Two-Component, Vinylester Adhesive Anchoring SystemAC100+ Gold

The AC100+ Gold is a two-component vinylester adhesive anchoring system that meets IBC for strength design of concrete anchors. Ideal for cold and moderate weather applications and works well in damp/wet holes. The AC100+ Gold is designed for bonding threaded rod and reinforcing bar elements into drilled holes in concrete and masonry base materials and can also be used to anchor into hollow masonry materials using screen tubes.

  • Code Listed: ICC-ES ESR 2582 for cracked and uncracked concrete
  • Designed for use with threaded rod and reinforcing bar hardware elements
  • Consistent performance in low and high strength concrete (2,500 to 8,500 psi)
  • Evaluated and recognized for freeze/thaw performance
  • Evaluated and recognized for a range of embedments in interior and exterior applications
  • Versatile low odor formula with quick cure time
  • Evaluated and recognized for long term and short term loading
  • Mixing nozzles proportion adhesive and provide simple delivery method into drilled holes
  • Cartridge design allows for multiple uses using extra nozzles

General Purpose Bonding Adhesive / Sealants


One-Component, Universal Adhesive / SealantPower Stick

PowerStick is a non hazardous, virtually odorless, one-component universal adhesive and sealant. PowerStick is the first professional grade product on the market that delivers high bond strength along with superior flexibility. It features a high aggressive initial tack, and will not react with the substrate when installed. It will not shrink and can even be applied to wet surfaces. PowerStick does not contain solvents, isocyanates, and is VOC compliant, which allows it to be shipped without any special shipping procedures. Cleaning up is easy with just soap and warm water or mineral spirits.

  • Elastic properties – can be used as a sealant for filling cracks and joints
  • No harmful components, solvent free and is VOC compliant (no isocyanates)
  • Can be shipped without restriction and is environmentally friendly
  • Inert formula will not interact with substrates such as metal trim, silver lining on mirrors, or foam insulation board
  • Works on virtually every base material
  • MS formula is not affected by water, moisture, or mildew during service
  • UV resistant formula is suitable for outdoor use
  • Superior initial tack
  • Accepts primer and paint unlike silicone based sealants


Protect Schools, Day Cares, & Playgrounds with Pecora Security Sealants

Protect Students & Young Children

With September right around the corner, there is no better time then when the students are off for summer, to make the necessary repairs to the interior and exterior of the building. Before making these repairs, the use and installation of Security Sealants should be strongly considered. Schools and similar facilities like; day cares and playgrounds, are very prone to idle tampering by students and young children. This idle tampering and vandalism leads to damages to the facilities, which in turn will require costly repairs. Along with the costly repairs, the chance of young children ingesting the extracted material can lead to a number of health related problems. Because of this, Security Grade Sealants are becoming a more viable option to traditional caulks and sealants. These Tamper Resistant and Tamper Proof sealants can significantly extend the life of the building and prevent costly damages and repairs. All of the areas within the reach of students and young children, both interior and exterior, should be properly sealed with security sealants to protect against potential tampering. Pecora DynaPoxy™ EP-1200 & DynaFlex™ SC, both available at Tanner, are great options to secure your schools, day cares, and playgrounds. Shop for Pecora DynaPoxy™ EP-1200 & DynaFlex™ SC here.

Why Choose Security Sealants?

Pecora School Coverage
(1) Use Pecora Dynaflex (2) Use Pecora Dynatrol II

Pecora Security Sealants not only protect the building itself, but they also protect the inhabitants inside and around the building. In facilities like schools, day cares, and playgrounds there can be much more at stake other than just the potential repair cost due to tampering. Pecora Security Sealants have the necessary properties to prevent this idle tampering and vandalism. In addition to the safety factors these security sealants present, user can also benefit from:

  • Decreased risk of lawsuits
  • Decreased maintenance costs
  • Increased service periods of sealants
  • Decreased replacement costs

Pecora Security Sealants vs Standard Caulking & Sealants

Shore Hardness ScaleMost caulks and sealants can be easily tampered with or are pickable. Pickable meaning, these caulks and sealants can be interfered with to the point of removal. Most of these flexible sealants are usually based on urethane or silicone chemisties and can be pulled away to expose a joint.

Pecora Security Sealants, often referred to as Tamper-Proof or Tamper-Resistant, far exceed the hardness and tensile strength of standard caulks and sealants. This makes it much more difficult for these security sealants to be dug into, cut, or pulled from a joint. A Tamper-Proof  or Tamper-Resistant Security Sealants requires a Shore A hardness of up to 80+ and 50, respectively, this prevents them from easily being extracted from a joint. Typically architectural sealants are designed for durability, weatherproofing, and accommodating expansion joint movement. Pecora DynaPoxy™ EP-1200 is a Tamper-Proof security sealant available at Tanner.

When using Tamper-Proof Sealants, you lose all movement capabilities. But when Tamper Resistance was necessary and not having any movement capabilities was unacceptable, a new class of sealant was needed. Pecora stepped in and came out with this new class of security sealants. The newly formulated sealants can be classified as Tamper-Resistant as opposed to Tamper Proof. These products have limited movement capabilities and can be used in properly designed joints. The sealants will allow for both a moving joint as well as having an acceptable level of tamper resistance. Pecora DynaFlex™ SC is a Tamper-Resistant security sealant available at Tanner.

Make Your Facility Tamper Proof with Break-Away Nuts

Break-Away Nuts

Security is a major concern on most peoples minds these days. From securing correctional institutions to protecting from vandalism in public places, having the right security products makes all the difference. At Tanner we are your premier source for security fasteners and nuts, providing you with a variety of different products. When it comes to looking for security nuts, the level of protection it offers should be the main determining factor for which type you buy. You can choose from either tamper resistant or tamper proof security nuts. Tamper resistant security nuts are extremely difficult to remove without the proper tools. While tamper proof security nuts have no removal tools, which makes them nearly impossible to remove once they are installed. The tamper proof security nuts that we offer here at Tanner are Break-Away Nuts.

Break-Away Nuts are designed as a one-piece unit that have a break-away hex head that leaves a conical shaped tamper proof nut behind.  These tamper proof nuts are used extensively in places where high security is a key factor such as: correctional institutions, hospitals, schools, public places, and retail stores. Break-Away Nuts help secure a variety of products, prevent unauthorized removal of, and secure access to equipment and facilities. They can be used for a number of critical security fastening applications where removal of a fixture is not intended and when preventing tampering is important. Break-Away Nuts are installed like a typical nut, except once the proper torque is achieved, the hex head breaks away leaving a conical shaped tamper proof nut behind. The conical shaped tamper proof nut that is left behind has no removal tool available making it nearly impossible to remove once installed.

Break-Away Nuts are manufactured from either ZAMAC 5 zinc alloy or 304 stainless steel. The stainless steel variety provides greater corrosion resistance and boasts high-strength properties compared to the zinc alloy nuts. These security nuts are typically tapped to standard bolt dimensions, but are also available to be tapped oversize for hot dip galvanized fasteners.

Break Away Nuts Material Specifications

If you are looking for a tamper resistant security nut instead, be sure to check out our line of Trident Nuts. We have a number of different sizes available and are one of the few distributors that offer Large Diameter Trident Nuts. If you plan on buying any of these Trident Nuts be sure to pick up the correct sockets and accessories to help install these security nuts correctly.






Know Your Torx® Tamper-Resistant Screws

Torx® Tamper-Resistant Screws

Torx® Tamper-Resistant Screws are characterized by their unique, six point, star shaped pattern. The star design provides various benefits, including preventing cam-out and increased ease in maintaining a consistent torque. Torx® Tamper-Resistant Screws contain a solid post formed in the middle of the recess during the heading process. The solid post blocks the insertion of an ordinary Torx screwdriver or any other driver. This added security feature makes it nearly impossible to remove without a unique tamper-resistant tool. Torx® Tamper-Resistant Screws that are available at Tanner are: masonry screws, self-drilling screws, sheet metal screws, and cap screws. Continue to read below for more information about each type of Torx® Tamper-Resistant Screws offer at Tanner.

Torx® Tamper-Resistant UltraCon® Masonry Screws

Torx® Tamper-Resistant UltraCon® Masonry Screws

Torx® Tamper-Resistant UltraCon® Masonry Screws are the perfect combination of the security of a Torx® tamper-resistant drive and the superior quality and easy installation of an UltraCon® masonry screw. These screws are the optimal fastening solution for use in concrete, brick, or hollow block. The special Hi-Lo threads on the Torx® Tamper-Resistant UltraCon® Masonry Screws lead to a greater resistance to pullout and also creates stronger fastening in masonry materials. These tamper-resistant masonry screws are coated with Stalgard® finish to provide superior corrosion resistance. The Stalgard® finish helps prevent red rust and other base material corrosion on significant surfaces, even after 800 hours of 5% neutral salt spray exposure (ASTM B117).

Torx® Tamper-Resistant Self-Drilling Screws

Torx® Tamper-Resistant Self-Drilling Screws

Torx® Tamper-Resistant Self-Drilling Screws eliminate the separate drilling and tapping operations for a faster, more economical installation process. This is possible because the Torx® Tamper-Resistant Self-Drilling Screws have a sharp, clean and consistent drill point, excellent thread engagement and holding power. What makes the Torx® Tamper-Resistant Drive System one of the most efficient fastening systems available is its ability to transfer greater torque, reduce end load, and virtually eliminate tool slippage. These fasteners are nearly impossible to remove without the special tamper-resistant Torx® Drive tool. Torx® Tamper-Resistant Self-Drilling Screws offered at Tanner are: pan head screws made from hardened 410 stainless steel, button head and flat/oval head screws, which are both made from zinc plated case hardened steel.

Torx® Tamper-Resistant Sheet Metal Screws

Torx® Tamper-Resistant Sheet Metal Screws

Torx® Tamper-Resistant Sheet Metal Screws are a high strength, one-piece, one-side installation fasteners, with the unique ability to “tap” their own mating internal thread when driven into preformed holes in metallic and nonmetallic materials. These screws have the ability to form or cut their own mating thread, creating an unusually good thread fit, which enhances resistance to loosening in service. They also have the ability to be disassembled and are generally reusable. Torx® Tamper-Resistant Sheet Metal Screws offer at Tanner are: button and flat head screws. Each head style is made in zinc plated case hardened steel and 18.8 stainless steel.

Torx® Tamper-Resistant Cap Screws

Torx® Tamper-Resistant Cap Screws

Torx® Tamper-Resistant Cap Screws have many of the same security features as the Torx® Tamper-Resistant Sheet Metal Screws. These screws are used in facilities where tamper-proofing is essential to reduce vandalism, tampering, and theft. Tanner offers three head style of Torx® Tamper-Resistant Cap Screws: button head, flat head, and flat head undercut. Each head style is made in zinc plated case hardened steel and 18.8 stainless steel.



Seal and Secure with Pecora’s DynaFlex SC and DynaPoxy EP-1200

Pecora DynaFlex SC is a unique one part, non-sag, tamper resistant elastomeric STPU (silyl-terminated polyurethane) joint sealant. It has many of the strengths of other two part security sealants, but with an easy to use application method. No mixing nozzles required here, instead DynaFlex can be installed quickly and easily with standard caulking equipment. DynaFlex can be used to seal any interior joints or openings that require a sealant. Suitable materials include: masonry to masonry, masonry to metal, or metal to metal. It can also be used on polycarbonate sheets for interior security glazing, but will require some priming to do so.

Dynaflex SC Security Sealant
Dynaflex SC Security Sealant

Dynaflex is designed to achieve high tensile and tear strengths, is abrasion resistance, and can achieve an average ultimate hardness of at least 55. Not only that, but it can withstand 25% total joint movement. With its rugged yet flexible attributes this sealant is ideal for institutional and correctional complexes as well as other public buildings and facilities. This sealant will prevent idle tampering and vandalism that could potentially endanger occupants, patients, and other citizens. Come shop for DynaFlex Sealants and Primers here.

DynaPoxy EP-1200
DynaPoxy EP-1200

DynaPoxy EP-1200 is a rigid, two part, high-solids, high-modulus epoxy resin compound. It is designed to be used along with DynaFlex or as an alternative product. DynaPoxy’s pick-proof properties makes it an ideal sealant for high security areas of prisons and other facilities. It has an outstanding adhesion to similar and dissimilar materials making it applicable for most areas. DynaPoxy’s high compressive strength and non-sag properties also allows it to be used as a structural adhesive for vertical and overhead bonding and grouting, as well as bolt embedment. DynaPoxy EP-1200 can be bought here as well as all of our other Security Products at

Custom Installations Are Simpler with Specialized Mounting Hardware

Specialized mounting hardware, such as security screws and fasteners are designed to resist tampering by the public, or an un-trained person. Specialized mounting hardware is designed with a what’s called a tamper-proof head. These fasteners require a specially designed tool that isn’t commonly available on the shelf of the local hardware store. You may see this type fastener on the walls in a public restroom.

The tamper resistant design prevents vandals from loosening the hardware that holds the fixtures or stalls together. Some of the fasteners have an uniquely shaped head, that a traditional Phillips or straight screwdriver won’t fit. The fastener is installed and removed by a tool that only an installation contractor, or factory authorized service professional would carry.

Other security screws have a traditional shaped head, like a Torx or Square drive screw. These security fasteners are modified, and have a small pin in the middle of the slot. Because of the pin, a standard tool won’t fit into the fastener. Installing or removing the fasteners requires a modified tool that features a hole in the tip which allows the tip to fit over the pin.

Security screws are also used in manufacturing. When the internal parts of a machine or electronic device cannot be serviced by the homeowner, or if opening an appliance, such as a microwave oven, could damage the item or the person, a specialized fastener is used. These fasteners prevent damage to the equipment, and potential harm to the owner.

Specialty tamper resistant fasteners are available in a full spectrum of steel grades, and fastener styles. They are available in stainless steel, alloy steel, and case hardened steel. Corrosion resistant coatings are available for exterior uses. These fasteners save property owners thousands of dollars by thwarting equipment vandalism, tampering and physical damage.

As manufacturing systems continue to advance, many manufacturers are designing their own fastening systems. Specialty products such as solar panels and composition deck boards are installed with hardware that is specifically designed for the project. When mounting a solar panel, not only does it have to be mounted securely to the building or roof, but the panel should also be easily removable in case of damage or needed maintenance. Solar panel mounting hardware is designed to provide both easy installation, and access for service. The right kind of installation hardware can save the installation contractor time, which results in a more profitable job.

Many new building are being designed with solar roof panels. As the demand grows for increasingly green energy solutions, architects and building owners are choosing to install the solar panels at the time the building is constructed. Specialty solar panel mounting hardware is recommended for this application. The uniquely designed hardware fasten the buildings metal roofing systems to the under-girding trusses or framework, and at the same time provides the studs to which the solar panels mount after the roof panels are installed.

When designing a custom hardware installation, make sure to research the installation options ahead of time.  A proper installation with the right fastener will save time, money and can prevent installation headaches.

Solar Panel Theft is Getting More Attention

A recent article over at focuses on the growing problem of solar panel theft. Solar theft grew by 15% in 2009, and has likely been on the rise ever since. The 15% figure, which the article quotes, is courtesy of SolarInsure, an insurance company specializing the solar industry.

So solar theft is on the rise. What can you do about? The article provides a good run down of options including different types of alarm systems, creating physical barriers, and the use of breakaway bolts, an item we carry at Tanner.

Note, in the article, they refer to breakaway bolts as “tighten-and-break” anti-theft screws. However, the more common term in the industry is breakaway bolts. These are truly tamperproof. Without extraordinary measures, it would be impossible for a thief to remove the bolts, but keep in mind, the same goes for you as the installer or solar panel owner.

Read the full article over at and if you have any questions we can answer, please share them in the comments section below.

The PV Industry Tackles Solar Theft

Specialty Mounting Hardware

Security screws are designed for installations where the fasteners are visible to the public, and the installer, manufacturer or owner want to ensure their equipment isn’t tampered with, damaged or removed. In a setting such as a public restroom, tamper proof fasteners are used to mount the stalls to the walls. These fasteners are installed with fastener specific tools. Some of the fasteners have a unique shaped slotted head. A traditional Phillips or straight screwdriver won’t fit into the head, and the fastener is installed and removed by a tool that only a the installation contractor would carry. Other security fasteners have a traditional shaped slotted head, like a Torx or Square drive. These fasteners have a small pin in the middle of the slot. A standard tool won’t fit into the fastener’s head. Installing or removing the fasteners requires a special tool that features a dimple in the tip which allows the tip to fit over the pin. These fasteners are called Pin-Head fasteners.
Continue reading Specialty Mounting Hardware