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 5835-00-313-7197
NSN 5975-01-068-4125
NSN 6110-01-495-0771
NSN 6145-00-471-3973
NSN 6130-01-116-3402
NSN 5855-01-231-4945
NSN 6135-01-527-9592
NSN 5835-00-309-0311
NSN 6240-01-190-3541
NSN 7035-00-153-3826
NSN 5975-00-104-5399
NSN 6110-01-332-3842