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 6610-01-310-3313
NSN 5935-01-654-5322
NSN 6105-00-433-2759
NSN 5950-01-322-9759
NSN 5895-00-087-5522
NSN 5905-01-203-5657
NSN 5998-00-526-9253
NSN 6135-01-312-1040
NSN 7035-00-368-8761
NSN 6145-00-130-3558
NSN 5998-01-113-7997
NSN 5985-00-008-3270