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 6240-01-087-8328
NSN 6240-00-765-4220
NSN 5965-00-239-3471
NSN 5998-01-539-1742
NSN 5920-01-011-9378
NSN 5990-01-188-7309
NSN 5915-00-816-4044
NSN 6645-01-633-1852
NSN 5960-01-512-0233
NSN 6220-01-202-8907
NSN 5895-00-379-4699
NSN 5960-01-027-8833