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 6610-00-189-7520
NSN 6130-00-450-4466
NSN 5925-01-351-5542
NSN 6650-01-073-9961
NSN 6320-00-270-8222
NSN 5996-01-152-5217
NSN 5915-00-451-5665
NSN 5895-01-437-4918
NSN 6110-01-360-0453
NSN 6145-00-956-6125
NSN 5910-01-023-7995
NSN 6610-01-023-1816