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 5960-01-276-2828
NSN 5999-00-196-2870
NSN 6650-01-100-3185
NSN 5935-01-620-1943
NSN 5835-00-333-6621
NSN 6150-01-224-6391
NSN 5965-01-100-1195
NSN 5965-01-310-5695
NSN 5905-00-770-6699
NSN 5975-01-396-5616
NSN 6220-00-904-2429
NSN 6645-01-394-7544