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 5855-01-147-6024
NSN 5910-01-278-4951
NSN 6150-00-243-9531
NSN 5895-01-371-2431
NSN 6620-01-379-9934
NSN 6610-01-142-3633
NSN 5975-00-878-6870
NSN 5910-00-394-1690
NSN 6220-01-534-6695
NSN 2925-01-442-4171
NSN 5960-01-649-1341
NSN 5998-00-010-9977