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 7035-01-541-4216
NSN 6685-01-467-8789
NSN 4140-01-307-8836
NSN 6320-00-223-0498
NSN 5998-01-094-5953
NSN 6650-00-195-7519
NSN 5965-01-313-9762
NSN 5999-00-953-0138
NSN 5965-01-147-5847
NSN 6685-01-323-3610
NSN 6130-00-131-6340
NSN 6130-01-384-9466