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 6220-01-439-9611
NSN 5930-01-213-4331
NSN 5835-01-120-5079
NSN 5925-01-362-3425
NSN 6650-01-506-5636
NSN 5990-01-562-4521
NSN 5996-01-393-4690
NSN 5965-01-381-2998
NSN 6645-00-350-8070
NSN 2925-00-858-0949
NSN 6105-01-412-0811
NSN 6645-00-171-9639