A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-094-6549
NSN 5835-01-085-3008
NSN 6220-01-534-6695
NSN 6240-01-214-7746
NSN 5895-00-490-1550
NSN 6135-01-204-3882
NSN 5950-01-602-2089
NSN 5930-01-204-3843
NSN 5835-01-068-3417
NSN 5835-01-293-6453
NSN 5915-01-481-3999
NSN 5910-00-170-6784