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 6105-00-299-0673
NSN 5945-00-923-0411
NSN 6130-00-277-7321
NSN 5945-01-449-7909
NSN 6105-01-535-5809
NSN 6110-01-452-5654
NSN 5960-01-243-7291
NSN 6620-01-231-3528
NSN 6650-01-534-5787
NSN 5945-00-464-7216
NSN 6320-00-116-3658
NSN 5855-01-566-4032