A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-448-9794
NSN 6610-01-615-8260
NSN 5945-00-391-5682
NSN 6650-01-068-5021
NSN 6150-01-089-9145
NSN 5930-01-461-3505
NSN 6150-01-500-1302
NSN 5910-01-389-7097
NSN 6240-01-411-4603
NSN 5835-00-867-7893
NSN 5996-01-279-0143
NSN 5930-01-567-7829