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 5925-01-441-9248
NSN 6645-01-473-3752
NSN 6220-01-193-6542
NSN 5985-00-740-1307
NSN 5950-01-085-5846
NSN 5975-01-171-9266
NSN 6110-01-473-9550
NSN 5905-00-106-6237
NSN 6220-00-527-1177
NSN 6320-01-512-2031
NSN 5945-01-136-4592
NSN 5915-01-453-3961