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 5895-01-452-1430
NSN 6320-01-458-1853
NSN 5998-01-012-7123
NSN 6610-01-440-0604
NSN 5990-00-703-0175
NSN 6110-00-623-2335
NSN 6145-01-068-0017
NSN 6645-00-456-7653
NSN 6240-01-541-2503
NSN 5985-00-329-6869
NSN 6320-01-177-3192
NSN 5998-00-222-4439