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 6220-01-285-7080
NSN 6220-01-070-2772
NSN 6145-00-767-5716
NSN 5999-00-349-1345
NSN 6610-01-352-5500
NSN 5905-00-312-4512
NSN 5960-00-529-2704
NSN 6320-00-116-3658
NSN 5930-01-371-2468
NSN 6685-01-614-7211
NSN 5990-00-323-8856
NSN 5998-00-860-6168