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 5990-00-394-3987
NSN 7035-00-445-9657
NSN 6620-01-085-8688
NSN 5965-01-086-5692
NSN 5935-01-561-5156
NSN 5905-01-352-0974
NSN 6620-01-423-2612
NSN 5915-01-150-1658
NSN 6320-00-593-0379
NSN 5895-01-581-7506
NSN 5910-00-433-3990
NSN 5910-01-263-5000