Used on c130 hercules
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 7035-01-591-1236
NSN 5998-01-548-5594
NSN 5915-01-061-4415
NSN 5935-01-370-2824
NSN 7035-01-391-7470
NSN 5998-01-246-3173
NSN 6105-01-085-6002
NSN 4140-01-658-2140
NSN 4140-00-580-8508
NSN 6110-00-180-4601
NSN 5999-01-561-8297
NSN 5910-01-233-5720