A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-01-024-2930
NSN 5895-00-197-7188
NSN 6220-01-099-8561
NSN 6220-01-477-5001
NSN 6130-00-627-6644
NSN 6685-00-082-1940
NSN 6220-01-284-6347
NSN 6135-01-246-0308
NSN 6220-01-051-0363
NSN 5965-01-602-7907
NSN 5985-00-432-3289
NSN 6620-01-514-7786