Category Archives: Fasteners

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.



Nord-Lock Wedge Lock Washers Now Available at Tanner!

Nord-Lock Tanner

We are happy to announce Nord-Lock Wedge Lock Washers are now available to you, our customers, on the Tanner website. Nord-Lock wedge lock washers have been rigorously tested and approved by independent institutes as well as certification authorities. Nord-Lock wedge lock washers are used in numerous  industries such as: energy, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military. Nord-Lock washers are approved by several industry standards and specified by numerous international companies. Over the operational life cycle, Nord-Lock wedge lock washers give increased operational reliability and lower maintenance costs while significantly reducing the risks of production stops, accidents and warranty claims.

Proven in Junker Vibration Test

The Junker test, according to DIN 65151, is considered the most severe vibration test for bolted connections. During the test, the joint is exposed to transverse movements underneath the bolt head / nut, while the clamping force is continuously measured. Nord-Lock washers are proven as a safe bolt securing system according to DIN 65151 tests performed by the independent research organizations IMA and CETIM. In addition, Nord-Lock personnel perform over 10,000 live Junker vibration tests around the globe every year.



Nord-Lock Washers provide more than just a safe locking function, using Nord-Lock products also improves the general performance of a bolted joint.

 Product Features and Benefits:

  • Maintains high clamp load and thereby ensures the function of the joint
  • Quick and easy to install and remove with standard tools
  • Locking function not affected by lubrication
  • Defined and uniform friction conditions which result in a more accurate preload
  • Same temperature characteristics as standard bolt / nut
  • Reusable – in addition, Nord-Lock washers do not affect the reusability of fasteners
  • The washers are hardened and can support and distribute great loads
  • High corrosion resistance
  • Can be used with fasteners up to grade 12.9 (ASTM A574)
  • Reliable locking, even for joints with short clamp length
  • Secures fasteners at both high and low preloads
  • No retightening needed
  • Verifiable locking function
  • Elegant solution and problem solving – modern engineering

 Additional Information:

Shop for Nord-Lock Wedge Lock Washers Here


Flex Technology, Is the Industry Leader in Critical Fastening

Flex Technology

With the harsh winter winding down, it’s a good time to check out the damage that has been caused by the vast amounts of inclement weather. A huge danger from this type of prolonged inclement weather is delayed embrittlement failures. These failures are caused by the presence of hydrogen which is generated in dissimilar metal applications. Galvanic reactions between dissimilar metals such as aluminum and steel, in the presence of moisture, reduces detrimental hydrogen. This can destroy the integrity of fastener grain boundaries, leading to sudden and potentially catastrophic failures.

To cope with such failures, Elco Construction Products has developed a line of products that utilize Flex Technology. This state of the art technology incorporates high performance and near immunity to these delayed embrittlement failures. These fasteners are made from special alloy materials that receive proprietary heat treatments and tempering processes. The Flex Technology line of products far exceed any standard fastening formats available. They allow designers and system manufacturers to manage their risks and enhance the performance of critical connections. All Flex Technology products also feature Stalgard durable, multi-layer, corrosion-resistant coatings, which are engineered to provide optimal performance in demanding construction applications. These finishes are environmentally friendly and are free of chromates and silicates, that might induce hydrogen embrittlement, preventing structural failures. To be sure you have the best fasteners for critical connections on the market, shop for Flex Technology Fasteners here at

Fasteners For Aluminum Applications and Anchors For Concrete ApplicationsSelf-Drilling & Self-Tapping Screws For Metal


Typical Flex Technology applications include:
Dissimilar metal applications
Windows, doors & skylights
Blast protection systems
Solar panel racking support systems
Building enclosures/envelope
Curtain wall systems, stone facades
Insulated metal panels

Flex Technology fasteners available here at Tanner include the following products.


Fastener Facts and FAQs

Keeping up with technology is a challenge. Each new gadget has a different feature than its predecessor, but who really knows the difference between the two? If you want to know the difference between the iPhone4 and the iPhone5, you ask someone who works for the company. If you want to know the pros and cons of HDTV versus 3D, you ask somebody in the television industry. If you want to know about construction fasteners, ask us. Below are some questions we are asked more often than others.

What type of screw gun should be used to install self drilling screws?

For optimal performance, the screw gun should meet the following characteristics:

  • 1800 to 2500 RPM variable speed
  • 6 to 8 amp motor
  • adjustable torque sensitive clutch mechanism
  • depth adjusting nosepiece

What is the difference between a self drilling screw and a self tapping screw?

Just because the names sound similar doesn’t mean they are one in the same. A self drilling screw is designed with a drill bit point. That special point helps to drill into metal without requiring holes to be pre-drilled. Primarily used for metal only, self drilling screws are also known as “tek” screws.

A self tapping screw, on the other hand, has a sharp point with threads and is usually designated as either type “A” or “AB”. (The difference between the two types is the thread size and pitch.) A self tapping screw carves its own thread as it’s being installed, similar to a tap. The difference lies in the fact that a self tapping screw, unlike a tap, requires a pre-drilled hole.

What is the difference between 304 and 316 Stainless Steel?

Not only does the shape of the screw, the style of the tip or the pitch of the threads matter, so does the material that makes up the screw. 304 Stainless Steel contains 18% chromium and 8% nickel. Molybdenum (“Moly”) is added in the 316 Stainless Steel so the percentages differ slightly, with 316 containing 16% chromium, 10% nickel and 2% molybdenum. The purpose of adding the moly is to help the fasteners last longer by resisting corrosion to chlorides like salt water or de-icing materials.

What is a flat undercut screw head?

There are circumstances in which you need more thread and less head in a small amount of space. Flat undercut screw heads are supplied to allow more room on the body of the screw for usable thread. The head height of undercut screws is approximately two-thirds the height of standard flat head screws. Drive depths are reduced proportionately.

Is there a security nut available that cannot be removed?

Security fasteners protect property from theft and misuse. Security screws are constructed with specialty heads that prevent any unauthorized person (anyone without the proper, hard-to-obtain tool) from removing them. And, yes, there are security nuts, too. After tightening to the proper torque, the hex section of a break-away nut shears off leaving a conical nut that cannot be removed.

EJOT Solar Fastening Systems

EJOT: “Your best partner for fastening solutions in the building industry.” This hardware is specially developed for securing uprights in solar installations. Made from high quality stainless steel, EJOT guarantees water tightness and a high load carrying capacity. It also allows exact adjustment of your new solar system. Watch this video to learn more about EJOT and how to install solar fastening systems on your home today.

Specialty Fasteners Simplify Difficult Installations

Flat Head Trim Fit UltraCon with White Stalgard Finish

When the industrial revolution transformed industry, manufacturers quickly designed universal fasteners which were suited for virtually every applications. A simple wood screw was used through the furniture industry, while fine threaded bolts and screws were used in metal product fabrication. Not until the end of the 20th century did manufacturers re-examine their approach to fastener design. Maybe it was advanced manufacturing methods or maybe someone in the field looked at a problem and designed a new, better mousetrap to solve an old problem. In any case, one of the most significant improvements in concrete fasteners in the last century is the concrete screw, or Tapcon screw.

Tapcon screws allow installers to drill smaller pilot holes than traditional shielded anchors. A Tapcon screw is manufactured from hardened steel, and features an abrasive, aggressive thread. Once a pilot hole is drilled, the concrete screw is screwed into the concrete with a power drill in much the same way a wood screw is fastened into wood. Quick and efficient, contractors use the tapcons to install low-load fixtures to concrete and cement block walls.

Installers must be careful with Tapcons, or they will create problems for themselves. First the tapcon hole must be drilled to the proper depth. If the end of the screw hits the bottom of the hole before it is screwed all the way in, the screw will likely ream the hole out, and not be able to grip the concrete.  Secondly, installers must use the correct diameter drill bit. If the hole is too large, the tapcon won’t grip the walls. If the hole is too small, the screw will bind as it enters the hole. In this case, a powerful drill will strip the head completely off the screw in just seconds, thus complicating the installation.

Solar panel mounting hardware – JA3 thread for wood substructure

Another application using specialty hardware is solar panel installation. With our nation’s push toward more green energy solutions, solar panels are being designed into new building energy systems, and are typically mounted in multi-panel arrays on the building wall or roof planes. The individual panels are held into the arrays via custom solar panel mounting hardware. When mounting a solar panel array, the fastener needs to create a ridged structure, but also allow for the panel to be installed and removed for inspection, maintenance and repair. For new buildings, or retrofit installations, the solar panel mounting hardware is designed as a single fastener that screws or threads into the building’s structural shell and then allows the solar panel to be mounted to the end of the fastener which is still exposed to the exterior.

When solar panels are mounted to a building’s roof, these specialty fasteners firmly attach the panels to the roofing system and allow for quick and seamless installation of the panels at a later date. For new buildings, specialty fasteners are recommended which fasten the metal roofing systems to the building’s framework and at the same time provide the studs to which the solar panels mount.

When designing a solar panel installation, make sure to research the installation options ahead of time.  A proper installation requires the right fastener and proper preparation and planning.

Specialty Fasteners Improve Job Productivity

My old bike

When I was young, I bought my first bicycle from a friend at the end of the block. It had been sitting in their backyard for a few months, and I don’t think I could describe all the things that were wrong with it.  To add to my dilemma, I didn’t have a tool box or wrench set to my name, and my Dad was in the habit of keeping his tool boxes locked, or hidden in the garage. Before the summer was over, I learned to repair almost anything on that ten dollar bicycle with a hammer, a pair of vice-grip pliers, and a large screw driver that I borrowed from Dad’s tool box when he wasn’t looking. I wasn’t very efficient, but at least I could change a flat tire, or adjust the seat and handlebars.

Unfortunately, the professional repair technician is often faced with the same dilemma when he is in the field. How often does a technician or contractor roll up on a job, and have the wrong tools and inadequate fasteners to complete a project efficiently, and with equipment that will stand the test of time?

As manufacturing moves away from one-size-fits-all approaches to the products they manufacturer, and becomes more segmented, specialty fasteners are becoming more common place. In the same way a contractor wants to have the right tool for the job, projects are becoming increasingly tied to having the right fastener as well as the right tools.


Marson blind rivets are a perfect example of an older fastening device that has been redesigned for today’s construction industry. Standard rivets used in metal fabrication are short pieces of steel which are put through holes in two pieces of metal, and then both sides of the steel bar are pounded over into mushroom-shaped heads. The joint is reliable, and the metals pull themselves together.  However, when only one side of the material is available, a blind rivet is the perfect adaptation of this device.

A blind rivet features a hollow, soft metal sleeve with a stiffer shaft inserted into the center. The rivet is pushed into the holes in the fasteners and then anchored in place with a specialized tool. Once the blind rivet seats itself, the center shaft snaps off, leaving a strong metal-to-metal joint that is unaffected by vibration.  Some of these fasteners feature threaded rivets. Once the rivet is fastened in place, a machine screw or stove bolt can be inserted. This fastener is the perfect solution when a threaded hole is needed in a piece of sheet metal.

Torx plus security screw

The Torx head fastener is one of the most innovative products in the last 20 years, and now Torx head fasteners are used in manufacturing and assembly plants around the world. This fastener is perfectly suited as a security fastener, and with a small change, Torx pin head security screws allow technicians to install equipment in public places with assurance that neither their fasteners, nor their equipment will not be tampered with.

Which Stainless Steel Anchor Should I Use for Masonry & Concrete?

Tanner offers three different levels of stainless steel anchors for use in concrete and masonry that is subject to corrosive environments.

UltraCon® SS4 is a threaded masonry anchor that offers the same proven performance as UltraCon masonry fasteners with the enhanced feature of 410 stainless steel and Stalgard® protective coating.

In fact, the UltraCon SS4 outperformed Stainless Steel Tapcon® screws in a 1500 hour salt spray test and has higher pull out values. UltraCon SS4 is available in 1/4” diameter in 5/16” diameter Hex Washer Head and #3 Phillips TrimFit Flat Head, from 1-1/4” up to 4” in length. Very easy to use- just drill and drive!

For more demanding applications, such as products utilized for hurricane reinforcement, use Crete-Flex® fasteners which receive a special hardening process during manufacture that maximizes corrosion resistance and ductility. In addition, Crete-Flex fasteners receive the unique Stalgard® coating process for further protection. After 2,400 hours in a salt spray cabinet (per ASTM B117), Crete-Flex fasteners show no signs of red rust.

Easily installed with a commercial-grade hammer drill or rotary hammer and a specially sized Crete-Flex carbide-tipped drill bit.

If your job includes working in an exposed area, such as coastal or wetlands, use Aggre-Gator® Bi-Metal Threaded Anchors. Perfect for installation of aluminum enclosures, hurricane shutters, windows, awnings, thresholds, curtain wall, window, and stone façade support anchors.

Aggre-Gator features a 300 series stainless head and shank with fused and hardened steel tapping threads and a gimlet point, hence “bi-metal” technology. 300 series stainless alloy gives unmatched corrosion protection while the steel tapping threads hold tight in the block and poured concrete. To top it off, coated with silver-colored Stalgard® GB, a Galvanic Barrier to protect aluminum components from accelerated corrosion when in contact with 300 series stainless steel.

Specialty Fasteners Save Time and Money

If you are a maintenance technician or installation contractor, you know the value of specialized security fasteners or self drilling screws.  Although these fasteners cost a bit more when you pick them up at the local supplier, specialized security fasteners speed up a job, saving the contractor and the project owner both time and money.

One of the recent applications of self drilling screws is in the area of steel stud construction. In the past, commercial buildings and homes were constructed entirely of wood studs and structural members. In the 1980’s and early 1990’s, because of the abundant supply of scrap and recycled metals, steel studs entered the market at competitive prices, and they feature a number of competitive advantages.

Steel studs are lighter than traditional wood framing materials. They don’t have to be drilled for access holes for electrical and plumbing, because the wide side of the stud is already designed with access holes. Installation contractors cut steel studs with a tin snip they carry in their tool belt rather than high power circular saws. Steel studs are fastened together with sell drilling screws, that are both lighter and less expensive than 3 ½ inch long spike nails.

Steel studs are only one application for self drilling screws. Any sheet metal fabrication project is faster and easier with using a self drilling screws, and self drilling screws are used extensively in manufacturing. The screw serves as its own drill bit. Thus the installation contractor can insert the screw in one step, instead of two.

Another important fastener for commercial and industrial contractors are tamper-proof screws and anchors. Often seen in public bathroom stalls or other building projects used by high numbers of the general public, the heads of a tamper proof screws are custom shaped so that both installation and removal requires specifically manufactured tools.

Tamper proof screws originally appeared in the marketplace as a modified slotted screw. The head of the screw was shaped so that it could be turned into place, but it could not be removed by a standard flat head screwdriver. These fasteners could only be used once, because removing them from the wall usually destroyed the fastener’s appearance.

Today, with the wide acceptance of Torx and square drive style fasteners, tamper proof fasteners have been redesigned. These fasteners are called pin-head security fasteners. In the center of the Torx, or Square slot is a small pin. Installation contractors must have a specialty designed tool to install, or remove this fastener.

So when you are looking for a supplier for industrial tools and fasteners, make sure you select a supplier that can ship the right part the first time, and on time. You will want to find a partner that can provide a wide selection of parts, grinding wheels, and the tools which go with them. Another advantage for the installer is finding a partner company that can provide all your specialty fasteners and tools from one location. Maintaining an efficient and profitable shop is much simpler when you can go to one supplier and order all your regular shop supplies. Picking a partner who will ship quickly, reliably can help your shop run smoothly, which creates satisfied customers, and a growing business.

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

Find a reliable vendor for your specialty fasteners

If you are a maintenance technician and serve commercial or industrial clients, some of the most important parts and tools, which you use every day, can be the hardest to find.  When a service technician arrives on a job site, nothing slows down a project, and therefore eats away a company’s profit margin, like having to leave a job site and run around town, looking for hard to find parts. So when you need to stock up a truck with commercial and industrial tools and fasteners, look for a supplier that can provide a wide range of equipment and fasteners with a single order.

One of the most important fasteners for commercial and industrial installations are tamper-proof screws and anchors. Used most often in public bathroom stall installations, the heads of a tamper proof screws are custom shaped so that both installation and removal require specifically manufactured tools.

Tamper proof screws originally appeared in the marketplace as a modified slotted screw. The head of the screw was shaped so that it could be turned into place, but it could not be removed. Removing these fasteners required a vice grip style locking pliers that would grip the screw head by clamping onto the outer edge.  These fasteners could only be used once, because removing them from the wall usually destroyed the fastener’s appearance.

Today, with the wide acceptance of Torx style fasteners, tamper proof fasteners have been redesigned. Torx head tamper resistant screws are made with a modified Torx style head. The screw can be installed, removed and reused when the installer has the correct tip for his cordless drill.

Another highly useful and disposable tool for commercial install and repair contractors are grinding wheels.  These round abrasive wheels attach to drills and grinding tools are indispensable in many settings.  Grinding wheels are used to clean off debris or rust scale from parts, or cut fasteners which are sealed in place by rust. In a commercial setting, plumbers, masons, framing contractors, steel workers and repair persons regularly rely on these tools.

Just like a drill bit or wood saw blade, the friction that the wheel creates during use slowly wears away at the abrasive characteristics, and the physical size of the tool As a result, these tools are disposable. In a heavy use setting, a contractor can wear out two or three grinding wheels in a week.

So when you are looking for a supplier for industrial tools and fasteners, make sure you select a supplier that can ship the right part the first time, and on time. You will want to find a partner that can provide a wide selection of parts, grinding wheels, and the tools which go with them. Another advantage for the installer is finding a partner company that can provide all your specialty fasteners and tools from one location. Maintaining an efficient and profitable shop is much simpler when you can go to one supplier and order all your regular shop supplies. Picking a partner who will ship quickly, reliably can help your shop run smoothly, which creates satisfied customers, and a growing business.