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 5915-01-196-1846
NSN 5945-01-649-6830
NSN 6150-01-112-7180
NSN 6145-00-242-0569
NSN 6240-00-906-6116
NSN 5920-00-405-8469
NSN 5935-01-472-2193
NSN 6110-01-522-4914
NSN 5905-01-568-4031
NSN 5895-00-288-5878
NSN 5910-01-003-6632
NSN 5950-00-798-5234