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 5920-00-876-3312
NSN 6320-00-225-7013
NSN 6110-01-384-7352
NSN 5905-01-529-9987
NSN 5985-01-611-7521
NSN 6130-01-545-8378
NSN 4140-00-946-6478
NSN 6130-01-008-3085
NSN 5945-01-505-6610
NSN 5999-01-265-5495
NSN 6645-01-165-3785
NSN 5985-01-423-1491