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 6645-01-214-2561
NSN 5910-00-090-3779
NSN 5950-01-599-5109
NSN 6135-01-541-6101
NSN 6620-00-973-7946
NSN 6145-01-088-8658
NSN 6240-01-628-2844
NSN 4140-01-300-9474
NSN 6685-01-386-5129
NSN 5910-01-449-5827
NSN 6130-01-502-6352
NSN 5965-01-267-8536