A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-649-0438
NSN 5945-01-170-4107
NSN 5905-00-203-4480
NSN 7035-00-096-9986
NSN 5999-00-601-0999
NSN 5905-01-415-6195
NSN 5950-01-512-1465
NSN 5950-01-512-1056
NSN 5915-01-345-9613
NSN 6110-00-669-6726
NSN 5925-01-125-5795
NSN 6645-01-023-3520