This 3/8-inch flat washer is made from plain steel with a zinc plating, providing corrosion resistance for general-purpose applications. The zinc finish inhibits red rust formation, extending service life in environments exposed to moisture or mild chemicals. Flat washers distribute the load of a threaded fastener, preventing damage to the mating surface and increasing the bearing surface for a more secure connection than a nut alone.
Commonly used in construction, automotive repair, and equipment assembly, these washers prevent fasteners from loosening due to vibration and support components in moderate stress applications. The zinc plating offers a balance of cost-effectiveness and protection against typical shop conditions.
Specifications
- Material / grade: Steel, low carbon
- Size: 3/8 inch
- Finish: Zinc plated
- Pack quantity: 500
- Thickness: 0.065 inch
In stock. Ships same day on orders placed before 3:00 pm CT. 30-day returns on unused stock in original packaging.





