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 5915-01-461-2425
NSN 5990-01-421-3325
NSN 5990-01-312-2638
NSN 5915-01-143-6759
NSN 5915-01-186-9107
NSN 5975-01-615-0994
NSN 6220-01-319-5716
NSN 4140-01-100-1223
NSN 5960-00-855-1098
NSN 6620-00-580-1462
NSN 5990-00-503-4724
NSN 5965-00-904-3451