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 5960-01-271-8107
NSN 5965-01-147-5655
NSN 5975-01-090-4772
NSN 5920-01-534-7042
NSN 5915-01-227-0158
NSN 5960-01-395-9834
NSN 5910-01-384-1613
NSN 6320-00-422-9006
NSN 5999-01-573-7184
NSN 5998-01-133-4744
NSN 6620-00-254-8985
NSN 5855-00-832-9341