A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-00-779-2854
NSN 5895-00-636-4842
NSN 2925-00-992-7904
NSN 5965-01-631-9848
NSN 5985-01-531-6711
NSN 5996-01-600-2856
NSN 5975-01-491-6813
NSN 6145-00-279-7136
NSN 2925-01-233-8545
NSN 5975-00-204-9190
NSN 5996-01-640-6852
NSN 5996-01-222-0790