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 6620-01-265-0632
NSN 5998-01-320-9487
NSN 5985-00-571-4908
NSN 5855-01-040-3882
NSN 6105-00-283-2849
NSN 6620-01-279-8884
NSN 5960-00-759-2534
NSN 6610-01-455-9137
NSN 5920-01-318-4111
NSN 5925-01-569-6083
NSN 5975-00-232-1785
NSN 5960-00-586-5292