A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-00-846-2785
NSN 5930-00-368-4149
NSN 6220-01-461-9643
NSN 5998-01-146-3761
NSN 5945-00-079-0884
NSN 5990-01-507-7495
NSN 6130-01-399-0126
NSN 5915-00-435-0371
NSN 2925-00-644-0028
NSN 5915-01-396-0792
NSN 6150-01-086-9418
NSN 6685-00-107-8099