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 6105-01-411-3996
NSN 5915-01-656-8877
NSN 6645-01-622-6161
NSN 6645-01-593-5290
NSN 5895-00-056-8573
NSN 5945-00-269-5375
NSN 5975-00-069-9324
NSN 4140-01-473-7511
NSN 6150-00-814-5905
NSN 6610-00-855-7607
NSN 2925-01-356-6017
NSN 6135-00-134-6648