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.
Dept. of the Navy 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6320-01-512-2031
NSN 6685-01-123-7244
NSN 5935-00-148-8381
NSN 5985-00-213-8633
NSN 5855-00-688-9954
NSN 5905-01-369-8876
NSN 5945-00-153-4655
NSN 4140-01-085-7810
NSN 6240-01-123-4459
NSN 6645-01-534-3148
NSN 7035-00-392-5417
NSN 5965-00-263-6436