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 5905-00-108-4239
NSN 5855-00-127-5559
NSN 6110-00-284-1161
NSN 5925-01-125-0403
NSN 5990-01-462-1617
NSN 5985-00-248-4277
NSN 5895-01-247-6113
NSN 5920-00-449-5249
NSN 5990-00-995-6071
NSN 6320-00-261-9136
NSN 5975-01-325-3281
NSN 5975-01-169-3580