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 5950-01-157-8898
NSN 5910-00-143-0851
NSN 6650-01-588-3554
NSN 6145-01-422-1830
NSN 2925-01-364-7926
NSN 6610-01-051-8484
NSN 6645-00-580-9605
NSN 6320-01-631-7828
NSN 5915-00-281-8175
NSN 4140-01-522-9128
NSN 5998-00-617-5925
NSN 6150-01-435-5026