A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5990-01-408-6554
NSN 5915-01-174-3462
NSN 5925-01-020-7706
NSN 7035-01-022-5763
NSN 5920-01-458-1770
NSN 4140-00-908-2763
NSN 5998-01-202-0095
NSN 2925-01-149-2865
NSN 5998-01-526-9978
NSN 5905-00-934-9711
NSN 5996-01-044-8961
NSN 6220-00-754-3452