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 5996-01-445-5528
NSN 5915-01-299-7843
NSN 6135-00-840-6451
NSN 6105-01-568-2771
NSN 5975-01-423-9387
NSN 6685-00-975-2538
NSN 6135-01-183-8993
NSN 5895-00-400-5948
NSN 5985-00-826-1735
NSN 5985-01-513-9930
NSN 6130-01-319-2645
NSN 5990-00-288-1820