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 6610-01-205-6424
NSN 6240-01-175-3877
NSN 5990-00-232-3965
NSN 5965-01-473-6082
NSN 5975-01-647-3469
NSN 5835-01-546-2008
NSN 5930-01-175-5542
NSN 6135-01-572-9340
NSN 5990-01-081-3845
NSN 5960-01-382-8772
NSN 6645-01-468-4990
NSN 7035-01-282-7124