Do not dupe to nsn 5310-00-903-5966; this nsn is for pearl harbor use only; this is a non-standard unit-of-issue
A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5950-00-092-2140
NSN 5910-01-441-7815
NSN 5935-00-270-6698
NSN 6320-01-365-2701
NSN 6135-01-379-1697
NSN 5905-00-615-6001
NSN 5935-00-813-8587
NSN 5975-01-453-4778
NSN 6130-01-242-7303
NSN 5905-01-218-9321
NSN 5905-00-248-6461
NSN 5965-01-302-2719