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 6240-00-681-2795
NSN 6110-01-005-3862
NSN 5915-01-541-3957
NSN 6320-01-442-3428
NSN 5855-01-188-4049
NSN 7035-00-931-9415
NSN 6610-00-365-4454
NSN 6110-01-607-8727
NSN 5835-01-198-5142
NSN 5930-01-647-2501
NSN 5930-01-087-0168
NSN 5935-00-007-9747