A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5998-01-382-7836
NSN 5925-00-275-7599
NSN 2925-01-564-8043
NSN 6320-01-102-0799
NSN 5905-01-494-2250
NSN 6610-00-848-4764
NSN 4140-00-886-1710
NSN 5895-01-370-8853
NSN 5945-00-214-6226
NSN 5998-01-444-3489
NSN 6320-01-425-1417
NSN 5998-01-604-8839