A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-01-580-0446
NSN 5920-01-415-2178
NSN 5935-00-991-2087
NSN 6130-01-528-4944
NSN 5930-01-400-6126
NSN 5990-01-370-5684
NSN 5905-01-490-6339
NSN 5905-01-505-6660
NSN 5999-01-154-1058
NSN 4140-00-010-2986
NSN 5950-01-106-4232
NSN 5945-01-212-2691