A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-00-504-6753
NSN 5835-01-606-8768
NSN 5950-00-225-8849
NSN 5996-01-444-5409
NSN 7035-01-386-5722
NSN 5960-01-512-0233
NSN 6620-01-187-4130
NSN 5905-01-414-6423
NSN 5920-01-575-0177
NSN 5895-00-826-8117
NSN 6645-00-462-7072
NSN 5935-00-449-5694