A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 4140-01-095-8466
NSN 5915-01-462-4225
NSN 5920-00-448-5369
NSN 5925-00-998-1633
NSN 5998-01-324-5985
NSN 6320-00-977-3930
NSN 5965-01-528-8152
NSN 6145-01-456-2222
NSN 6220-01-267-1411
NSN 6150-01-334-7077
NSN 5965-00-811-3793
NSN 5855-01-396-8734