A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-01-370-9853
NSN 6135-00-708-0892
NSN 4140-01-064-1684
NSN 5950-00-966-6560
NSN 4140-01-207-3577
NSN 5895-01-089-6418
NSN 5855-01-234-5346
NSN 6130-00-880-3980
NSN 5895-01-634-0630
NSN 6135-01-277-7397
NSN 5930-01-116-0890
NSN 5965-01-170-0075