A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5920-01-467-0842
NSN 6650-01-529-6416
NSN 6610-01-587-6068
NSN 5985-01-176-2332
NSN 5950-01-336-6462
NSN 6150-01-219-8696
NSN 5855-01-475-4454
NSN 5895-01-634-0630
NSN 5950-01-471-4999
NSN 5835-01-284-5689
NSN 5960-01-369-8666
NSN 5895-01-070-5061