Carbon steel; hardened to rc 52-54
No other part numbers with same form, fit, and function found.
NSN 5960-01-641-5493
NSN 5930-00-142-6504
NSN 4140-01-140-6781
NSN 6620-01-025-1443
NSN 6645-00-574-9712
NSN 5965-01-003-2641
NSN 5835-01-116-2369
NSN 6650-00-023-5054
NSN 5915-00-216-8185
NSN 4140-01-068-0140
NSN 6620-01-319-9804
NSN 5915-01-436-3245