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 6240-01-113-2396
NSN 5975-01-499-4210
NSN 6135-00-840-6451
NSN 5996-00-832-9495
NSN 4140-01-265-8669
NSN 5975-01-546-5572
NSN 6110-00-297-5768
NSN 5965-01-112-8758
NSN 5920-01-390-6318
NSN 5910-00-528-9714
NSN 6135-00-950-2669
NSN 6150-00-113-2259