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 5990-00-293-6031
NSN 6685-01-510-3891
NSN 6110-00-774-1792
NSN 5999-01-212-5045
NSN 6645-01-363-0160
NSN 6320-01-250-0290
NSN 6220-01-544-9626
NSN 5910-00-394-1690
NSN 5965-01-286-6548
NSN 5835-00-484-1529
NSN 5930-00-919-1906
NSN 5960-01-628-2760