A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-524-4895
NSN 5930-01-100-1084
NSN 6620-01-004-7072
NSN 6320-01-462-2295
NSN 6620-01-415-2307
NSN 5905-01-040-4636
NSN 5996-01-246-2472
NSN 5985-00-476-6790
NSN 5920-00-991-2262
NSN 6320-00-174-1362
NSN 6620-01-098-9866
NSN 5915-01-509-4953