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 6105-00-043-0550
NSN 5930-01-138-0698
NSN 2925-01-027-1293
NSN 5835-01-464-7038
NSN 5935-01-082-0195
NSN 5996-01-392-3171
NSN 5905-00-383-2915
NSN 5915-00-359-7776
NSN 5950-00-738-8488
NSN 2925-01-519-3221
NSN 6620-00-613-3023
NSN 5998-01-486-3496