Beefy Thick USS Flat Washer Set For Hardware Projects, 25 Pack, Half Inch By One And Three Eighths Inch Zinc Plated Steel, Meets ASME B18.21.1 Industrial And Commercial Grade, Makers Bolt

Heavy USS flat washer set for hardware projects, 25-pack
✔️ 25 washers; 1/2 in inner hole, 1-3/8 in outer dia, zinc plated

This is a thick USS flat washer set designed for general hardware assemblies. It’s commonly used in automotive, machinery, and workshop projects to distribute load and protect bolt heads and nut surfaces.

✅ Size: inner hole 1/2 in (12.7 mm), outer diameter 1-3/8 in (34.92 mm), inner diameter 9/16 in (14.29 mm), thickness 0.086-0.132 in (2.19-3.35 mm)
✅ Type: USS flat washer (thicker than SAE)
✅ Material: low carbon steel
✅ Plating: zinc plated for moderate corrosion resistance
✅ Meets ASME B18.21.1 industrial/commercial grade
✅ Quantity: 25 washers per package

💡 What is a flat washer used for in mechanical assemblies? A handy piece for spreading load and protecting surfaces in joints. - load distribution across surfaces for bolts and nuts - prevents embedment and galling in metal joints - works with standard bolts and nuts in machinery - adds corrosion resistance in outdoor settings