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 5950-01-191-1711
NSN 5895-01-334-6260
NSN 6610-01-163-5484
NSN 6110-01-209-2960
NSN 6220-00-055-8136
NSN 5855-01-537-5323
NSN 5960-01-292-0027
NSN 5920-01-200-3867
NSN 5960-01-507-9112
NSN 5990-00-309-0023
NSN 6220-01-246-4285
NSN 6135-00-223-9563