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 5905-00-433-1253
NSN 5835-01-123-8305
NSN 6685-01-511-0052
NSN 6320-01-457-2805
NSN 5935-01-160-7141
NSN 5930-00-592-4435
NSN 6110-01-262-5387
NSN 5998-01-197-7417
NSN 5835-01-384-3206
NSN 5895-00-318-1502
NSN 6145-01-523-7322
NSN 5985-00-500-0269