A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-00-218-6105
NSN 5985-01-093-4685
NSN 5925-01-268-1826
NSN 4140-01-100-1223
NSN 5835-00-841-2650
NSN 5915-01-044-8916
NSN 5985-01-462-0828
NSN 5915-01-308-0957
NSN 5950-01-608-4489
NSN 6105-00-012-2392
NSN 5945-00-883-6628
NSN 5975-01-051-7434