Hex washer head
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 18-8 | Stainless steel 18-8 is an alloy of steel with high corrosion resistance. Stainless has become the material of choice for exterior and most marine applications. |
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.
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