A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-499-5889
NSN 6620-01-641-8741
NSN 6650-01-444-6364
NSN 5855-01-105-7793
NSN 6220-00-244-2040
NSN 5905-01-317-4312
NSN 6650-01-381-2972
NSN 6135-01-174-8057
NSN 5998-00-913-3469
NSN 6645-00-348-2841
NSN 6650-01-601-8194
NSN 6145-01-193-4568