A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-00-763-6180
NSN 5915-01-275-9360
NSN 5855-01-085-5354
NSN 6240-01-276-7745
NSN 6645-00-334-9225
NSN 6130-00-198-4997
NSN 5920-01-475-4892
NSN 5965-01-608-0537
NSN 6135-01-398-5922
NSN 5855-01-627-0837
NSN 5996-00-241-9376
NSN 5835-01-468-4210