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 6650-00-310-2534
NSN 5855-00-165-3093
NSN 6610-01-298-5662
NSN 5905-01-514-2888
NSN 6240-01-449-2883
NSN 7035-01-209-2431
NSN 5895-01-340-1736
NSN 6150-01-139-2716
NSN 6650-01-067-8946
NSN 5910-01-343-2362
NSN 5985-01-548-9573
NSN 7035-01-648-8510