A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6135-01-265-1384
NSN 6105-01-633-3485
NSN 6620-01-484-2767
NSN 6220-01-360-9659
NSN 6645-01-352-5675
NSN 5910-01-243-0599
NSN 6610-01-152-2821
NSN 5895-01-440-9847
NSN 5855-00-973-5717
NSN 5910-01-340-9867
NSN 5935-01-445-5144
NSN 2925-01-391-1540