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 5925-00-915-1204
NSN 6110-00-248-7475
NSN 5965-00-204-8513
NSN 5998-01-148-8591
NSN 6105-01-281-0310
NSN 6220-01-647-8536
NSN 6220-00-635-8818
NSN 7035-00-631-3782
NSN 4140-01-165-0566
NSN 5960-01-245-6088
NSN 5905-00-434-3752
NSN 6130-00-938-1374