A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-00-383-6712
NSN 5975-01-118-6016
NSN 5915-01-328-5854
NSN 2925-01-345-5463
NSN 4140-00-466-9268
NSN 5895-00-321-9484
NSN 6220-00-279-1508
NSN 6105-00-468-6323
NSN 5855-01-256-2551
NSN 5930-01-278-9224
NSN 5910-01-150-8610
NSN 5950-00-375-6285