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 6145-00-553-8196
NSN 6650-00-196-5311
NSN 5998-00-040-9072
NSN 2925-01-550-0177
NSN 6610-00-855-7607
NSN 5945-00-422-5330
NSN 5975-01-634-0678
NSN 5945-00-729-3403
NSN 6320-01-050-1290
NSN 7035-00-079-7189
NSN 5945-00-275-0557
NSN 5998-01-159-8832