Hex washer hd self drilling w/bonded sealing washer
Highly versatile, used in wood, fiberglass and metal, also called self-tapping screws. Available in steel and stainless steel.
Material | Description |
Zinc plated steel | Steel is zinc plated for moderate protection against rust. |
Stainless steel 410 | A stainless alloy harder than the 18-8, but not as resistant to corrosion as 18-8. |
General
There are several different locations on a fastener where one can measure the diameter.
The most commonly used diameters are:
- Thread Diameter (T). Also called major diameter.
- Shank Diameter (S).
- Root Diameter (R). Also called minor diameter.