A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6150-01-415-2345
NSN 6130-01-090-0631
NSN 6320-00-886-9771
NSN 5910-01-242-1025
NSN 5960-01-370-4285
NSN 6110-01-208-7900
NSN 6650-01-321-8823
NSN 2925-01-033-8948
NSN 6135-00-110-1981
NSN 6620-00-542-1579
NSN 5960-01-065-0273
NSN 5925-01-234-8312