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 5965-01-598-5505
NSN 5996-01-012-5716
NSN 6105-00-988-9903
NSN 5998-01-384-4776
NSN 6105-00-068-0436
NSN 5895-01-040-5193
NSN 5950-01-414-1398
NSN 6240-00-156-1607
NSN 5915-01-179-8587
NSN 6620-00-010-8190
NSN 6220-01-553-4719
NSN 6650-01-417-9115