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 5935-01-583-2670
NSN 5945-01-218-9315
NSN 6135-00-194-9354
NSN 6645-01-364-0867
NSN 5905-01-356-7468
NSN 4140-00-252-7734
NSN 7035-00-465-3298
NSN 6685-00-248-6990
NSN 5950-01-265-0880
NSN 6685-01-379-8209
NSN 5915-01-309-6006
NSN 5975-00-360-2166