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 5996-00-166-7402
NSN 5855-00-411-8688
NSN 5905-01-320-7519
NSN 6145-00-861-1572
NSN 6105-01-534-0444
NSN 5930-01-595-2065
NSN 5920-01-461-8719
NSN 5996-01-449-0666
NSN 5905-00-038-6961
NSN 5960-00-220-2284
NSN 6620-01-059-0876
NSN 6320-01-281-6028