A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-00-575-9230
NSN 5920-01-222-5107
NSN 5910-01-589-7714
NSN 6135-01-091-6021
NSN 5920-01-382-5323
NSN 5930-01-211-7654
NSN 5960-01-119-1288
NSN 6645-01-202-7986
NSN 4140-00-249-5603
NSN 5960-00-262-0160
NSN 4140-00-613-9209
NSN 6320-01-547-9877