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 6145-00-729-3702
NSN 6130-00-083-3720
NSN 5935-01-194-6019
NSN 7035-00-421-8710
NSN 5990-01-124-9063
NSN 7035-01-307-5366
NSN 5945-01-221-0478
NSN 5999-01-565-6169
NSN 6320-00-908-6841
NSN 5855-00-631-4565
NSN 5950-00-670-7842
NSN 5950-01-176-1590