1000 Qty 5/16" Zinc Plated USS Flat Washers (BCP309)

• Package of 1000 United States Standard premium washers
• Inside Diameter 3/8"
• Outside Diameter .897"
• Thickness .104"
• Zinc plated for corrosion resistance

These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.  Flat washers are commonly used in decks and fence building.