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 5920-01-332-6414
NSN 5975-00-651-3919
NSN 6150-01-146-8212
NSN 2925-01-153-7794
NSN 5915-01-383-2041
NSN 5905-01-607-6163
NSN 5998-01-010-2038
NSN 6130-01-486-6941
NSN 5915-01-161-5847
NSN 5999-00-219-8270
NSN 5965-00-360-9534
NSN 6135-01-128-5358