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 6220-01-162-7954
NSN 5999-01-268-9674
NSN 5915-00-775-9076
NSN 5985-01-516-5188
NSN 6105-01-606-1209
NSN 5925-01-562-4897
NSN 5985-01-094-4780
NSN 5990-01-463-5400
NSN 5935-00-490-0321
NSN 5915-01-551-3109
NSN 6220-00-905-5686
NSN 7035-01-270-0325