A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5910-01-501-5099
NSN 6685-01-408-6372
NSN 5985-01-458-0379
NSN 6110-01-538-8213
NSN 6135-01-424-1114
NSN 5975-01-254-2851
NSN 5895-01-322-4836
NSN 5910-01-010-2911
NSN 6130-01-316-3648
NSN 6105-00-114-2165
NSN 5905-01-369-2261
NSN 5925-01-422-0431