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 6240-00-974-5925
NSN 6105-00-024-1076
NSN 5920-00-384-8926
NSN 5996-01-437-9747
NSN 6135-01-611-8483
NSN 5895-01-651-7466
NSN 7035-01-166-2473
NSN 5960-00-899-0942
NSN 5998-00-317-7215
NSN 5950-01-570-5389
NSN 5996-01-069-6806
NSN 5905-01-341-3066