A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-590-3323
NSN 6650-01-096-6803
NSN 6620-01-401-5356
NSN 5910-01-410-7749
NSN 5965-01-510-3456
NSN 5950-01-597-0087
NSN 5915-01-538-7581
NSN 5930-00-951-8012
NSN 6650-01-049-5361
NSN 6620-00-555-3992
NSN 5975-00-162-2083
NSN 5925-01-215-0767