A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-094-9540
NSN 5910-01-085-4889
NSN 6320-00-004-9158
NSN 5910-01-339-9658
NSN 5975-01-590-4185
NSN 6105-00-288-5872
NSN 5905-00-867-9916
NSN 6135-00-057-2005
NSN 5990-00-932-9324
NSN 5996-01-127-3381
NSN 5915-00-281-5414
NSN 5985-01-027-0777