Back Home / Fasteners / Washers / FLAT WASHER SAE ZINC 3/8″ EXTRA THICK THRU HARDENED FLAT WASHER SAE ZINC 3/8″ EXTRA THICK THRU HARDENED SKU: XETSFW38 Categories: Fasteners, Washers Used to improve stress distribution, and to span large holes. Yellow zinc plated. Made from heat treated thru-hardened steel. SAE PATTERN Used to improve stress distribution, and to span large holes. Yellow zinc plated. Made from heat treated thru-hardened steel. SAE PATTERN Case Quantity: 100 Log In For Pricing