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 4140-01-536-4098
NSN 5835-00-065-6757
NSN 5925-01-237-2501
NSN 5990-01-594-7470
NSN 6685-01-322-4323
NSN 6645-00-596-5388
NSN 6645-00-988-3167
NSN 7035-01-651-4199
NSN 5935-01-100-0662
NSN 6130-00-558-6112
NSN 5999-01-300-7817
NSN 5960-00-156-4954