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 6110-00-309-2898
NSN 5945-00-156-0781
NSN 5950-01-634-0677
NSN 5905-01-264-5407
NSN 5935-01-506-8239
NSN 6645-01-430-2420
NSN 5996-01-536-6982
NSN 6110-01-513-4718
NSN 5950-01-037-8270
NSN 6130-01-374-3617
NSN 5855-01-462-5150
NSN 5920-00-964-4538