A small cylindrical, circular-like, nonmetallic item whose outer curved surface has a circumferential groove(s) to enable it to be self-retained when inserted in a hole.
NSN 6610-01-646-9101
NSN 5935-00-464-1299
NSN 2925-01-541-5031
NSN 6150-01-018-3764
NSN 5965-01-555-8007
NSN 6650-01-493-6638
NSN 5925-00-633-6236
NSN 6220-01-644-1362
NSN 5975-01-093-2469
NSN 5855-01-484-9948
NSN 7035-00-513-9764
NSN 5996-00-954-0556