A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-483-9174
NSN 5905-01-299-9197
NSN 6320-01-397-0399
NSN 5950-01-174-1725
NSN 5985-01-055-8921
NSN 6650-01-188-8028
NSN 5990-00-483-8352
NSN 5915-01-270-6093
NSN 5998-00-050-3711
NSN 5905-01-354-8905
NSN 6135-01-544-8463
NSN 5998-00-758-0876