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 5945-01-026-9393
NSN 5925-01-406-1537
NSN 6610-00-144-7036
NSN 5910-01-170-6669
NSN 2925-00-833-9466
NSN 6620-01-456-0529
NSN 5975-00-927-4982
NSN 5915-01-256-5149
NSN 5905-01-384-7884
NSN 6110-01-235-8512
NSN 5915-01-409-2926
NSN 6110-01-417-3395