A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-01-512-6281
NSN 2925-01-268-5464
NSN 5905-01-162-9149
NSN 5855-01-398-9548
NSN 5960-01-573-6483
NSN 6145-01-487-3773
NSN 6320-01-021-6633
NSN 6135-01-415-1163
NSN 6150-01-308-3222
NSN 6240-01-641-9347
NSN 4140-00-285-6042
NSN 5935-01-525-4016