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 6150-01-444-4639
NSN 6650-01-043-2201
NSN 5960-01-605-9921
NSN 5950-01-065-0858
NSN 6105-00-707-7498
NSN 5930-01-416-7757
NSN 6610-01-424-3213
NSN 4140-00-852-7101
NSN 4140-01-201-4359
NSN 5930-01-217-0514
NSN 5965-01-468-5583
NSN 5855-01-134-7106