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 5920-00-285-0903
NSN 6220-01-546-6371
NSN 5985-00-943-3533
NSN 6105-00-982-4723
NSN 5945-01-455-2140
NSN 6240-01-018-4895
NSN 5950-01-471-8138
NSN 5910-01-053-3980
NSN 5950-01-564-4692
NSN 6650-01-447-4631
NSN 2925-00-005-1618
NSN 6150-00-244-4618