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 5915-01-572-1126
NSN 6685-01-633-1154
NSN 5945-01-163-5198
NSN 6240-01-013-8895
NSN 6130-01-031-4107
NSN 5935-01-506-5231
NSN 5915-01-213-3247
NSN 5985-00-725-8311
NSN 5895-01-594-3657
NSN 5930-00-282-2736
NSN 2925-00-781-8421
NSN 5935-01-398-1649