A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6150-01-094-7298
NSN 6150-00-145-8922
NSN 5925-00-374-2528
NSN 6150-01-268-6750
NSN 6645-00-312-2752
NSN 5999-00-179-0149
NSN 5930-00-961-4503
NSN 6220-01-495-9231
NSN 6150-01-241-8908
NSN 2925-01-074-9102
NSN 2925-01-064-3729
NSN 5925-01-497-7944