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 5990-01-421-5342
NSN 5975-00-279-3108
NSN 4140-01-452-9428
NSN 5985-01-630-5951
NSN 5965-01-513-7758
NSN 5930-01-512-5754
NSN 5895-01-111-5920
NSN 5905-01-282-3105
NSN 5960-00-085-2809
NSN 5996-01-428-6754
NSN 5855-00-138-2386
NSN 6610-01-075-7490