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 6645-00-654-8804
NSN 5835-00-113-6090
NSN 5998-01-341-0704
NSN 6645-01-469-9094
NSN 5990-01-439-4643
NSN 5835-00-583-1316
NSN 5835-00-192-9568
NSN 6620-01-593-0817
NSN 5915-01-365-7340
NSN 5905-01-406-0761
NSN 6220-00-969-4651
NSN 5925-01-515-8060