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 6610-00-155-1334
NSN 5925-01-200-7813
NSN 6150-00-248-2580
NSN 5915-00-265-0967
NSN 5925-00-650-1069
NSN 5965-01-608-9404
NSN 5996-00-614-9310
NSN 6220-01-528-2153
NSN 5915-01-629-0187
NSN 5910-01-280-4492
NSN 5999-01-610-7107
NSN 5925-00-999-9320