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 6135-00-405-1989
NSN 6610-01-511-5260
NSN 5960-00-140-9583
NSN 5910-00-467-8167
NSN 6685-01-455-5509
NSN 5915-01-606-8569
NSN 5835-01-027-1828
NSN 5855-00-316-5050
NSN 6240-01-626-9055
NSN 5895-00-901-5769
NSN 5960-01-416-6187
NSN 6150-00-797-3937