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 6320-01-255-2096
NSN 6610-01-509-2048
NSN 5985-01-485-0456
NSN 5925-01-211-7745
NSN 6150-00-647-3285
NSN 5930-01-343-8102
NSN 5910-00-454-8260
NSN 2925-00-278-9468
NSN 6320-00-139-1090
NSN 5999-01-634-0576
NSN 6685-01-284-6525
NSN 6645-01-607-9104