Hillman Hot Dipped Galvanized Steel 5/8 in. USS Flat Washer, 25-Pack Exterior Siding Trims A: Usually no—the square neck

A: Usually no—the square neck under the domed head grips the material to prevent spinning while you tighten the nut

162 in diameter

and each piece covers 9 sq ft

Partially threaded shank provides a strong clamp with reduced shear

Hillman Hot Dipped Galvanized Steel 5/8 in. USS Flat Washer, 25-Pack Exterior Siding Trims A: Usually no—the square neck5 8 in. Galvanized USS Flat Washers (25 Pack) These Hillman USS flat washers are made of durable steel with a hot dipped galvanized finish for corrosion resistance. Sized for 5 8 inch coarse thread bolts, they distribute load to protect wood and hardware in outdoor and heavy duty applications. Key Features: Corrosion Resistant Finish: Hot dipped galvanization helps withstand moisture and outdoor exposure Load Distribution: Flat washer design spreads