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 5985-00-677-0439
NSN 4140-01-429-4031
NSN 6145-01-246-3988
NSN 6220-01-320-1410
NSN 2925-00-778-0645
NSN 5910-01-382-1663
NSN 5975-00-679-6738
NSN 6240-01-012-5443
NSN 6610-01-643-0778
NSN 5855-01-572-5390
NSN 6105-01-196-4782
NSN 5965-00-686-0957