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 6145-01-263-2041
NSN 6320-01-106-4414
NSN 6685-01-157-4454
NSN 6135-01-643-3114
NSN 6650-01-197-0587
NSN 6610-01-155-2118
NSN 5985-01-564-2319
NSN 6220-01-172-0266
NSN 5996-01-633-7979
NSN 5975-01-110-5341
NSN 6130-00-315-8886
NSN 6130-01-160-3520