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 6645-01-130-4963
NSN 5835-01-381-2683
NSN 6650-00-972-8527
NSN 6620-00-959-6614
NSN 5985-00-564-1362
NSN 6645-01-247-2201
NSN 6610-01-447-2560
NSN 7035-01-182-1086
NSN 6150-01-259-9285
NSN 6620-00-109-9498
NSN 6135-01-513-1515
NSN 5950-01-087-3952