A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-148-3670
NSN 5915-01-069-0453
NSN 5945-01-423-9086
NSN 5855-00-130-5756
NSN 6220-01-057-1133
NSN 5990-01-400-3299
NSN 5855-01-100-3272
NSN 6150-00-360-1508
NSN 5985-01-470-5176
NSN 6105-01-629-6481
NSN 2925-01-455-2558
NSN 5930-01-217-8942