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 6610-01-396-5628
NSN 6135-01-014-3144
NSN 7035-00-541-8516
NSN 5999-00-090-4745
NSN 5960-01-580-6360
NSN 5975-01-466-8388
NSN 6110-00-130-5342
NSN 5855-00-763-2155
NSN 6320-00-174-1362
NSN 6240-01-390-2597
NSN 5925-01-487-7629
NSN 6145-00-421-6874