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 6685-00-903-1290
NSN 5998-01-174-5783
NSN 6135-00-995-1089
NSN 5905-00-869-8049
NSN 6645-01-141-9251
NSN 6110-00-709-2720
NSN 5895-01-381-6574
NSN 5975-01-023-8773
NSN 6150-01-151-1602
NSN 5835-01-392-7683
NSN 5930-01-583-0494
NSN 6645-00-246-4934