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 5910-00-579-7752
NSN 5855-01-285-3483
NSN 6135-01-067-8331
NSN 6220-01-131-2377
NSN 5999-00-080-0268
NSN 6320-01-631-7828
NSN 6685-01-368-3262
NSN 5945-00-258-9856
NSN 5835-01-561-2959
NSN 6220-01-125-0468
NSN 5999-01-599-3180
NSN 6610-01-424-3213