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 6320-00-089-9425
NSN 6685-01-538-6710
NSN 6135-00-635-9187
NSN 4140-01-359-2643
NSN 6240-01-461-9011
NSN 5910-01-376-2932
NSN 7035-01-067-8991
NSN 6150-00-058-4892
NSN 5895-00-082-7978
NSN 5915-00-216-8185
NSN 6685-00-971-2570
NSN 5960-00-924-1944