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 4140-00-122-6422
NSN 5975-01-422-2033
NSN 5985-01-127-6513
NSN 6620-00-854-5024
NSN 5910-00-398-0930
NSN 6135-01-142-2417
NSN 6150-00-082-3305
NSN 4140-01-224-8715
NSN 6145-00-840-2017
NSN 4140-01-273-0196
NSN 5835-01-502-9228
NSN 5925-01-591-5365