A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-01-339-6972
NSN 5975-01-170-5633
NSN 6320-01-411-7456
NSN 6620-00-702-9487
NSN 5905-01-406-4005
NSN 6240-00-683-0725
NSN 6685-01-595-2749
NSN 6685-00-390-0912
NSN 5998-01-127-4270
NSN 5945-01-362-4074
NSN 6685-01-490-3505
NSN 5950-01-474-2016