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 6150-01-262-9606
NSN 5915-01-617-7683
NSN 5910-01-101-6038
NSN 6220-01-351-9046
NSN 5945-01-504-4743
NSN 6620-01-580-9746
NSN 6320-01-484-7734
NSN 6130-00-359-2747
NSN 6240-01-401-5340
NSN 5915-01-456-2818
NSN 5996-01-173-9030
NSN 5855-00-586-6255