A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-512-8201
NSN 5945-01-148-3025
NSN 6135-01-512-8105
NSN 5935-00-769-6260
NSN 6610-00-292-9895
NSN 6135-01-116-3385
NSN 6685-01-146-5249
NSN 5855-01-344-8688
NSN 6320-01-090-8296
NSN 6130-00-497-4789
NSN 6645-01-568-7517
NSN 6645-00-547-4388