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 5975-01-401-5355
NSN 5990-01-244-9998
NSN 5920-01-397-5598
NSN 6610-01-336-2787
NSN 5935-01-431-9040
NSN 5945-00-367-4106
NSN 5945-01-609-4301
NSN 6620-01-205-6608
NSN 5990-01-411-5930
NSN 5930-01-225-6781
NSN 5855-01-188-4049
NSN 5945-01-056-4142