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 5895-01-525-3839
NSN 5975-01-045-7623
NSN 7035-01-374-0005
NSN 6130-01-245-7589
NSN 5965-01-535-0718
NSN 6240-01-069-2688
NSN 5975-00-918-2965
NSN 6685-01-612-0511
NSN 5960-01-278-9394
NSN 5915-01-456-9884
NSN 6610-00-883-5160
NSN 6135-01-151-2705