A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 4140-01-432-1447
NSN 6130-01-602-8991
NSN 5996-00-098-3864
NSN 5855-00-586-6255
NSN 5950-01-487-3750
NSN 6150-01-394-5316
NSN 4140-00-132-2061
NSN 5945-01-056-7133
NSN 6685-01-400-4192
NSN 5945-01-076-4801
NSN 5835-00-185-4919
NSN 5998-01-134-8445