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 5920-00-333-9977
NSN 2925-01-203-0493
NSN 6130-01-463-2249
NSN 6240-00-557-4402
NSN 5855-00-631-4565
NSN 5999-01-247-9492
NSN 6240-00-344-8582
NSN 6685-01-283-4084
NSN 5925-00-523-0377
NSN 6145-01-061-0962
NSN 6620-00-675-6689
NSN 2925-00-088-6790