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 6135-01-375-6724
NSN 5990-00-730-6269
NSN 5950-01-124-8527
NSN 7035-00-897-7567
NSN 7035-00-631-3782
NSN 5965-00-594-3115
NSN 5910-01-098-8438
NSN 5920-00-894-4556
NSN 5905-00-827-5903
NSN 6220-01-197-0486
NSN 6105-01-226-4746
NSN 5920-00-004-6372