A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6220-01-630-5354
NSN 5920-01-629-9523
NSN 5935-00-647-4020
NSN 5975-00-156-3654
NSN 6685-01-445-8939
NSN 5835-00-113-6090
NSN 2925-00-862-8550
NSN 5990-00-682-7986
NSN 5835-00-927-6013
NSN 5965-00-134-0883
NSN 7035-00-215-3272
NSN 6145-00-046-4568