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 6150-01-186-3973
NSN 5925-01-360-3090
NSN 6145-01-316-9735
NSN 5910-01-511-0224
NSN 5945-00-737-8083
NSN 2925-00-813-3971
NSN 5905-01-345-8206
NSN 6130-00-130-1156
NSN 6610-01-313-6450
NSN 2925-01-320-6512
NSN 6645-00-274-5670
NSN 5920-00-455-9743