500pcs Flat Washers Nylon Ring Plain Repair Gasket Insulating M3 M4 M5 M6 M8 M10

M8 (16 8 1.5) mm 40PCS. M4 (8 4 1) mm 50PCS. M10 (20 10 2) mm 10PCS. M6 (12 6 1.2) mm 50PCS. M5 (10 5 1) mm 50PCS. M3 (6 3 1)mm 100PCS. This washer provides a bearing surface for load distribution and wear resistance of the fastener.

eBay