Duro Dyne® HIGH HEAD PRO POINT® 15188 Screw With Neoprene Washer, #10 Thread, 1-1/2 in OAL, Unslotted Hex Head, Steel

Duro Dyne® HIGH HEAD PRO POINT® Screw, #10 Thread, 1-1/2 in Overall Length, Unslotted Hex Head, 5/16 in Drive, 0.175 in Drill, #3 Point, Self-Drilling Point, Steel, Zinc-Plated

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.

• Material cold heading quality steel wire
• Corrosion resistance
• Hardness-case hardened to Rockwell C52-58

Specifications