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 5999-01-119-6236
NSN 6135-01-418-4156
NSN 5990-01-529-7307
NSN 6240-01-553-6007
NSN 5910-01-188-8442
NSN 5935-00-845-3618
NSN 6130-01-443-1509
NSN 6135-01-141-4916
NSN 5910-00-315-3449
NSN 5965-01-063-6115
NSN 5965-01-151-0903
NSN 6135-00-027-3914