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 5999-00-309-4265
NSN 5915-00-359-4102
NSN 5905-00-929-2693
NSN 6145-00-188-3657
NSN 6610-01-225-3941
NSN 6105-00-402-5915
NSN 6130-00-922-1418
NSN 5985-00-046-1877
NSN 4140-00-660-8699
NSN 6240-00-064-0182
NSN 6320-01-213-3974
NSN 6620-00-770-9794