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 5925-00-478-2290
NSN 5999-01-445-4540
NSN 6645-01-531-5321
NSN 6150-01-429-1236
NSN 6130-00-003-6100
NSN 6105-00-372-4716
NSN 6220-01-446-5582
NSN 7035-00-299-7150
NSN 5960-00-450-6353
NSN 6150-01-017-6117
NSN 5935-00-414-1370
NSN 5930-01-583-9734