A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-148-8865
NSN 6150-01-144-5259
NSN 5975-01-089-5167
NSN 6610-01-013-8922
NSN 5925-01-383-4076
NSN 6645-01-322-4413
NSN 5915-01-633-9845
NSN 5835-00-148-9719
NSN 5996-01-200-5493
NSN 6105-00-265-7545
NSN 5855-00-361-0167
NSN 5996-01-073-6860