A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-00-789-1454
NSN 5990-01-607-3528
NSN 5960-00-268-3200
NSN 5998-00-549-6670
NSN 6150-01-435-4432
NSN 6320-01-399-6177
NSN 5965-00-330-9672
NSN 5925-01-461-8378
NSN 5930-01-321-9034
NSN 5930-01-081-8569
NSN 5975-00-583-6091
NSN 5998-01-044-5816