Color yellow federal standard 595 no. 23538
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 5895-01-005-5163
NSN 6220-01-460-5605
NSN 5905-01-018-4308
NSN 6650-01-454-5175
NSN 6645-00-888-5820
NSN 5835-01-168-6256
NSN 5965-00-978-8535
NSN 6150-00-810-9605
NSN 5915-01-034-3494
NSN 6135-01-442-4581
NSN 5905-01-321-5122
NSN 6110-01-212-3344