Tag Archives: drill screws

New USA Made Self-Drilling Screws Now Available

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Avoid the Tariffs, Shop High-Quality USA Made Self-Drilling Screws

With the recent rise in tariffs, there is no better time than now to buy American made fasteners. Melted & poured in the USA, this new lineup of self-drilling screws is American through and through. Manufactured under the ISO 9001:2015 standards to be sure we consistently provide high-quality drill screws every time. These self-drilling screws are fully compliant to the Fastener Quality Act, maintaining complete lot control and traceability.

American Made Self-Drilling Screwslogo_MadeUSA

American made self-drilling screws are a staple of any construction drill screw program. Featuring TanCor Corrosion Resistant Coating, which provides 1,000 hours of salt spray protection. These self-drilling screws are heat-treated in strict accordance with SAE J78 industry standard. It is NOT recommended to use these drill screws in critical applications where dissimilar metals (aluminum) and exposure to moisture are involved. Available in a few different options:

Read on to learn more about each line of American Made Self-Drilling Screws.

New American Made Self-Drilling Screw Lineup

Standard Self-Drilling Screwbox_StandardSelfDrillingScrews_06

  • Staples of any construction job site
  • Option in with Zinc Plating (#10-16 x 3/4″)
  • All others feature TanCor Corrosion Resistant Coating
  • Provides 1000 hours of salt spray protection
  • #10, #12 & 1/4″ diameters
  • 3/4″ – 6″ lengths
  • Made in the USA

Standard Self-Drilling Screws with Bonded Sealing Washersbox_StandardSelfDrillingScrewsBW_06

  • Applications requiring a weather-tight seal
  • Galvanized bonded sealing washers
  • Option in with Zinc Plating (#10-16 x 3/4″)
  • All others feature TanCor Corrosion Resistant Coating
  • Provides 1000 hours of salt spray protection
  • #10, #12 & 1/4″ diameters
  • 3/4″ – 4″ lengths
  • Made in the USA

Heavy Duty Drilling Self-Drilling Screwsbox_HeavyDrillSelfDrillingScrews_06

  • Thick metal applications
  • For steel up to 1/2″ thick
  • Feature TanCor Corrosion Resistant Coating
  • Provides 1000 hours of salt spray protection
  • #4, #4.5 & #5 point sizes
  • #12 & 1/4″ diameters
  • 7/8″ – 6″ lengths
  • Made in the USA

Heavy Duty Drilling Self-Drilling Screws with Bonded Sealing Washersbox_HeavyDrillSelfDrillingScrewsBW_06

  • Thick metal applications (1/2″ thick steel)
  • Applications requiring a weather-tight seal
  • Galvanized Bonded Sealing Washer
  • Feature TanCor Corrosion Resistant Coating
  • Provides 1000 hours of salt spray protection
  • #4, #4.5 & #5 point sizes
  • #12 & 1/4″ diameters
  • 7/8″ – 3″ lengths
  • Made in the USA

Self-Drilling Screws – How They Work

Self-Drilling Screws eliminate the need for separate drilling and tapping operations, helping provide the user with a faster, more economical installation process. Self-Drilling Screws operate on the same basic principles as a drill bit or other cutting tool. Performance for these screws are determined by cutting speed, feed rate, depth of cut and the working material being drilled into.

Optimal Performance Conditions for Self-Drilling ScrewsOptimalCuttingConditionsScrewSize

Proper installation of self-drilling screws depend on a number of factors and can (mostly) be controlled by the user. The table to the right, can be used as a guide to help properly install different nominal screw sizes. *Suggested combined maximum values. Values may be increased or decreased, as long as associated variable are changed proportionally.

  • Screw Point Geometry – the shape of the self-drilling screw drill point, not directly adjustable by the user
  • RPM – the speed of the drill/driver motor while installing the screw. Can be adjusted using a variable speed drill/driver
  • Applied Force – a measurement of the force applied by the user as the screw is installed, more force is not necessarily better
  • Work Material Hardness – the material’s resistance to drilling or cutting, in most cases, the harder the material, the more difficult it is to drill/cutSelfDrillingScrewAnatomy

Important Features to Consider When Choosing a Self-Drilling Screw

When selecting the correct self-drilling screw for your application, there are a number of factors to take into consideration. This includes the types of materials being attached and the thickness of the materials. In addition to the working material, the following design features should be also be considered before selecting your screw.

  • Drill Flutes – allow the drilled material to exit the hole, once completely embedded, the flutes can no longer remove these chips. These chips contain approximately 80% of the heat created during the installation process. If these chips buildup, this could cause the point to over-heat and fail.
  • Point Length – determines the thickness of the material which the screw can dependably drill through. The pilot section of the drill point, unthreaded portion, must be able to completely drill through the working material before the threads engage. Fasteners can bind and break if the threads engage before drilling is complete.DrillPointWings
  • Point Wings – are not present on all self-drilling screws, they are used when you need to fasten thicker materials, such as wood to metal applications. When drilled, the wings will enlarge the hole in the fastened material, allowing the threads to pass through without engaging the threads. This added clearance prevents the separation of the materials being fastened together, known as jacking. The wings will then break away once the come in contact with the metal before the threads engage the metal.

Self-Drilling Screws Available at Tanner

At Tanner we offer one of the most complete lines of self-drilling screws available. Choose from: Standard Self-Drilling Screws, Bi-Metal Self-Drilling Screws, Self-Drilling Reamers, Structural Self-Drilling Screws, Tamper-Resistant Self-Drilling Screws & much more! If you have any trouble finding a particular size or style of screw online, please feel free to reach out to one of our knowledgeable product specials – Email: websales@tannerbolt.com | Phone: 800-456-2658

Don’t Forget About

  • Screw Drill Point Material – are usually plain carbon steel which is less stable at high temperatures. To help reduce the wear on the drill point, fasten using a motor drill rather than an impact driver or hammer drill.
  • High Temperature Failure – the heat generated when drilling in self-drilling screws affects how quickly the drill point fails. For additional information on this, please refer to the troubleshooting guide below.
  • Drilling Temperature – motor RPM, applied force and work material hardness, all contribute to the the drilling temperature. Increasing any of these values also increases the heat generated.
  • Reducing Applied Force – this can help increase durability, allowing the drill point to penetrate thicker materials.
  • Reducing Motor RPM – this can help improve the performance when drilling into harder materials. This will allow the user to push harder during the drilling process and extend the drill point life.

Drill Point Failure Examples