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 6320-01-166-3602
NSN 5985-01-561-6361
NSN 5998-01-124-3043
NSN 5925-01-603-7738
NSN 5930-01-444-5410
NSN 6150-01-423-7843
NSN 6145-01-398-3125
NSN 5960-00-936-3334
NSN 5975-01-465-3948
NSN 5915-01-143-2262
NSN 5935-00-179-0649
NSN 6685-00-258-2257