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 6130-01-421-4538
NSN 7035-01-406-5232
NSN 4140-01-146-4474
NSN 5985-00-302-9394
NSN 6150-01-475-3072
NSN 6610-01-167-8747
NSN 6145-01-012-2823
NSN 5925-00-262-5651
NSN 5895-00-280-7528
NSN 5915-00-392-6420
NSN 5920-01-085-0825
NSN 6145-01-163-5219