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 6620-00-193-9503
NSN 7035-01-093-7216
NSN 6145-01-247-5423
NSN 5915-00-984-8707
NSN 6130-00-232-7617
NSN 5990-01-258-3848
NSN 5998-00-654-5278
NSN 6105-01-372-7034
NSN 5985-00-868-5229
NSN 7035-01-391-9858
NSN 6240-00-514-3507
NSN 5920-00-243-9506