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 6320-00-937-5625
NSN 4140-01-602-5458
NSN 6220-01-187-2664
NSN 7035-01-387-0338
NSN 5996-01-443-4713
NSN 5999-01-155-3391
NSN 6110-00-476-0993
NSN 5990-01-351-3746
NSN 5935-01-032-1935
NSN 5999-01-525-7937
NSN 6110-01-025-0086
NSN 5905-00-383-2915