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 6150-01-540-9594
NSN 5999-01-213-1977
NSN 5835-01-525-3220
NSN 5985-00-431-4462
NSN 5945-01-423-1009
NSN 5895-01-470-3414
NSN 5920-01-188-6458
NSN 6645-00-690-0423
NSN 2925-01-384-4139
NSN 5975-00-710-7099
NSN 6620-01-551-7071
NSN 5855-00-832-9341