A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-227-4485
NSN 6645-00-216-6126
NSN 5910-01-137-4211
NSN 7035-01-453-3601
NSN 5855-00-973-5717
NSN 5998-01-379-7753
NSN 5975-00-041-1426
NSN 5965-00-983-1815
NSN 5915-01-260-0291
NSN 5835-01-330-8597
NSN 6320-00-823-2015
NSN 6610-01-429-7267