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 5990-00-980-0102
NSN 5950-00-192-6084
NSN 5975-01-165-8433
NSN 6620-01-467-2111
NSN 5895-00-908-1720
NSN 5960-01-483-6256
NSN 6645-01-290-9428
NSN 5855-01-359-0373
NSN 6135-00-947-7091
NSN 7035-01-613-6620
NSN 5920-01-076-4634
NSN 5895-01-270-1018