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 6645-01-432-1068
NSN 6650-00-382-6080
NSN 5930-00-316-1338
NSN 7035-00-495-2137
NSN 5998-01-275-1824
NSN 6130-00-060-4698
NSN 6105-01-365-2634
NSN 5920-00-584-4592
NSN 5975-01-078-9343
NSN 6130-01-067-2886
NSN 7035-01-498-2510
NSN 5910-01-066-0803