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 5855-00-885-8452
NSN 5905-01-133-1551
NSN 6645-00-510-6643
NSN 5950-01-483-4000
NSN 5910-01-237-3456
NSN 6240-00-443-8000
NSN 4140-00-828-1421
NSN 6220-01-044-6940
NSN 5985-01-057-8944
NSN 6145-00-866-8994
NSN 6620-00-943-0449
NSN 5998-01-479-4392