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 6150-01-226-2057
NSN 5930-01-041-6786
NSN 5990-00-539-7859
NSN 7035-01-406-5232
NSN 5930-00-269-4996
NSN 5985-00-275-0880
NSN 5998-01-413-9177
NSN 7035-01-600-5923
NSN 6145-00-233-6010
NSN 5905-01-355-8919
NSN 6240-01-626-1075
NSN 6645-01-579-4247