Dyed blue federal standard 595 no. 15123
No other part numbers with same form, fit, and function found.
A nut having a flat bearing surface and 6 flat sides with slots in its upper portion. An integral feature is incorporated for locking on the threads of a mating member. The slots, when used in conjunction with a solid or split (cotter) pin, act as an extra "fail safe", feature in critical applications. Excludes nut (1), self-locking, castellated, octagon.
Classification: Nuts of iron or steel
NSN 5990-00-152-3929
NSN 5910-01-112-0723
NSN 5935-00-880-7638
NSN 5975-01-519-4582
NSN 5965-01-498-1974
NSN 5996-01-004-7832
NSN 5855-01-291-6790
NSN 6650-01-455-8923
NSN 5945-01-506-2703
NSN 5935-01-268-2935
NSN 5925-01-178-2555
NSN 6240-01-469-8823