A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-059-0876
NSN 7035-01-603-4898
NSN 6650-01-613-8063
NSN 5950-01-348-8965
NSN 5975-01-261-2995
NSN 5960-00-104-5955
NSN 5910-01-211-2756
NSN 6220-01-624-7419
NSN 5975-00-769-5564
NSN 5998-01-167-1570
NSN 6685-01-139-4944
NSN 6150-01-579-9100