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 6645-01-195-3329
NSN 2925-01-440-9912
NSN 5960-00-579-0298
NSN 6150-00-798-1131
NSN 5985-01-456-5901
NSN 6610-01-278-9291
NSN 5975-01-388-3929
NSN 5935-01-184-4270
NSN 7035-01-143-3573
NSN 6320-01-549-7201
NSN 6320-01-132-2746
NSN 5915-01-055-7417