A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-078-1309
NSN 6220-01-423-8319
NSN 5999-01-157-0748
NSN 5895-00-545-8723
NSN 5905-01-477-1482
NSN 6685-00-233-6563
NSN 6135-01-394-4160
NSN 6135-00-477-8847
NSN 5930-00-335-7301
NSN 6650-00-272-2271
NSN 6685-00-388-8821
NSN 6145-01-094-6822