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 6150-01-169-0960
NSN 4140-01-450-6802
NSN 6620-01-649-0748
NSN 6685-00-079-1415
NSN 5960-00-283-9702
NSN 5990-00-452-9194
NSN 6130-01-219-1185
NSN 5990-01-442-3520
NSN 5935-01-589-0610
NSN 5915-01-051-1984
NSN 6145-00-966-8961
NSN 5915-00-489-5029