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 5945-01-370-4784
NSN 5915-01-324-3262
NSN 5990-00-548-6163
NSN 5910-00-943-9191
NSN 5930-01-620-7522
NSN 5905-01-537-1903
NSN 6240-01-146-2850
NSN 6650-01-392-8020
NSN 6110-00-213-1287
NSN 5895-01-487-7724
NSN 5998-00-432-1460
NSN 6610-01-536-4056