A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-446-7245
NSN 6610-00-598-5268
NSN 6130-00-870-3172
NSN 5950-01-578-4800
NSN 6320-01-624-0193
NSN 5895-01-099-9748
NSN 5925-00-296-8123
NSN 6645-01-159-5173
NSN 4140-01-604-9652
NSN 5930-01-353-5846
NSN 6135-01-310-9866
NSN 5935-01-392-0981