A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-00-118-8762
NSN 6105-00-820-1763
NSN 6105-00-418-4430
NSN 6150-01-573-7433
NSN 5895-01-081-9272
NSN 5975-01-641-4517
NSN 5960-01-395-1164
NSN 5895-00-534-3163
NSN 5920-00-283-7178
NSN 5945-01-167-8498
NSN 5905-01-358-5522
NSN 5975-01-578-6592