Brand: Allstar Performance Manufacturer's Part Number: ALL18848-50 Part Type: Washers Product Line: Allstar Performance Countersunk Washers Automotive Fittings Part Number: AAF-ALL18848-50 UPC: 848238084047 Washer Outside Diameter (in.): 1.25 in. Washer Outside Diameter (mm): 31.750 mm Washer Inside Diameter (in.): 0.25 in. Washer Inside Diameter (mm): 6.350 mm Washer Thickness (in.): 0.125 in. Washer Thickness (mm): 3.175 mm Washer Material: Plastic Washer Color: Blue Inside Diameter Chamfer: No Hardened: No Quantity: Sold as a set of 50. Notes: Can be used with bolts with a head size of up to 0.750 in. Description: Allstar Performance countersunk washers are designed to allow the socket head fasteners to install flush with the surface, creating a smooth, finished appearance. They have many uses, including mounting roofs, spoilers, side skirts, and replacing sharp-edged fasteners inside of the cockpit. The washers are manufactured from aluminum and come in your choice of black or natural finishes.