A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6135-01-386-5709
NSN 4140-01-109-6834
NSN 6135-01-142-6456
NSN 7035-00-225-6499
NSN 5998-00-519-6418
NSN 5996-01-442-0832
NSN 5835-01-463-2334
NSN 5920-01-089-7903
NSN 5905-00-225-9777
NSN 5925-00-839-0293
NSN 5935-01-487-9338
NSN 6105-01-393-9069