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 5920-01-609-7048
NSN 5915-01-382-9383
NSN 5985-00-567-6492
NSN 5910-00-821-9605
NSN 6610-01-513-4711
NSN 6320-01-536-3077
NSN 5960-01-244-2835
NSN 5935-00-879-5415
NSN 6135-01-442-7275
NSN 5985-01-547-0735
NSN 2925-01-113-6904
NSN 6650-00-859-1859