A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-340-8686
NSN 6240-01-551-9723
NSN 6240-01-094-6262
NSN 6145-01-442-5336
NSN 6130-00-949-3393
NSN 5915-01-359-5844
NSN 5990-01-650-9034
NSN 6135-00-242-9531
NSN 5990-01-343-2187
NSN 5996-01-299-4542
NSN 5920-01-648-1983
NSN 5945-00-426-8825