A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-00-853-7785
NSN 5910-01-091-5941
NSN 6620-00-155-2608
NSN 2925-00-485-0543
NSN 5910-01-472-2232
NSN 6650-00-221-7119
NSN 5915-00-223-5308
NSN 5920-01-146-4503
NSN 6105-01-309-0084
NSN 5996-00-170-8060
NSN 6685-01-069-4336
NSN 5975-01-142-7392