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SCREW DRILLING/TPG SELF #8-18 STL #2

  • Item Code: 14185
  • Brand: Duro Dyne
  • Unit Size: 1

Description

Several common methods such as rivets, screws, and spot welding are used to fasten materials to ductwork. Three types of screws are most often used. The first is self-tapping only and requires a hole to be drilled before the screw can be utilized. The others are both self-tapping but also create their own holes. Self piercing screws have very sharp points which act much like a scratch awl in making a small opening in the steel for the threads to engage and work the sheet metal into a coned threaded hole. These work well for light gage steel. Self-drilling screws have an integral drill point which creates a large hole for tapping. This allows the screws to be used on heavy gages of steel. The maximum total thickness of steel that the self-drilling screw can be used with is determined by the drill point.

Features

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    • Cold heading quality steel wire
    • 0.166 to 0.161 in major dia
    • 0.122 to 0.116 in minor dia
    • Case hardened to rockwell C52-58

Tech Specs

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Brand Duro Dyne
Diameter - Thread Size #8-18
Drive Size 1/4 in
Finish Zinc Plated
Hardness C52-58
Head Type Hex Unslotted
Material Steel
Measurement System Imperial
Point Size #2
Thread Length 1/2 in

Documents & Guides

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Catalog
Specification Sheet

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