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 6150-01-519-9309
NSN 5950-01-541-5599
NSN 6145-01-247-0200
NSN 5920-00-869-6403
NSN 5960-01-170-4057
NSN 5835-01-442-6482
NSN 6145-01-316-8089
NSN 6220-01-593-0061
NSN 5945-00-504-5213
NSN 5835-01-385-0579
NSN 6135-01-185-1057
NSN 5999-01-155-3690