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 6240-00-468-7089
NSN 5895-01-485-5352
NSN 5985-01-139-3789
NSN 6130-01-148-7664
NSN 5895-01-129-5291
NSN 6650-01-582-7780
NSN 5999-01-338-8720
NSN 5965-01-295-1125
NSN 6610-01-643-6652
NSN 6145-00-402-0414
NSN 5855-01-607-5982
NSN 6620-01-633-8443