A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Classification: Copper washers including spring washers not threaded
NSN 5998-00-583-8617
NSN 5975-01-551-7778
NSN 6320-00-116-3658
NSN 5925-00-119-8654
NSN 2925-00-185-1618
NSN 5965-00-661-0469
NSN 6685-01-559-9954
NSN 5930-01-500-7636
NSN 6220-01-146-5152
NSN 5945-00-233-7426
NSN 5996-01-633-7979
NSN 5905-01-157-8275