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 5990-01-411-5930
NSN 5925-00-468-2757
NSN 5975-01-215-3473
NSN 6220-01-141-6900
NSN 5930-01-586-8946
NSN 6620-00-895-9774
NSN 5990-00-359-9839
NSN 6135-00-900-2139
NSN 5920-01-416-8756
NSN 5996-01-494-8178
NSN 5999-01-337-4936
NSN 6610-01-546-2802