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 6130-01-279-6467
NSN 6240-01-565-3840
NSN 2925-00-452-6403
NSN 2925-01-348-8306
NSN 5925-01-057-2690
NSN 5920-00-142-9993
NSN 5895-00-588-6525
NSN 5975-01-287-2155
NSN 5925-01-385-9384
NSN 6240-01-195-1750
NSN 4140-01-209-2668
NSN 5950-01-647-7038