A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-539-1956
NSN 5985-00-316-6184
NSN 6645-01-162-8023
NSN 6150-01-599-8365
NSN 6135-01-322-4655
NSN 5895-01-162-6253
NSN 5960-01-241-1844
NSN 5925-00-402-1583
NSN 5950-00-808-7158
NSN 6650-01-196-4667
NSN 2925-01-133-8128
NSN 5965-01-284-5076