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 5985-00-514-3882
NSN 5950-00-552-1991
NSN 5915-01-136-6556
NSN 6620-01-205-0320
NSN 6150-00-172-0155
NSN 6145-01-644-0534
NSN 6150-01-292-7885
NSN 5835-01-613-9485
NSN 5960-00-958-3154
NSN 6320-00-546-9249
NSN 5975-00-073-4130
NSN 7035-01-347-3617