Underwater life support iaw navsea instruction 10560.2b
A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).
Classification: Other articles of iron or steel not wire nesoi
NSN 6105-01-026-1884
NSN 5920-00-399-7760
NSN 5965-01-527-8847
NSN 7035-00-335-7283
NSN 5930-01-236-1489
NSN 5895-00-071-3994
NSN 5835-01-497-5029
NSN 4140-01-055-2076
NSN 5915-01-493-7530
NSN 5855-01-070-8084
NSN 5925-01-578-0814
NSN 5915-01-465-8343