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 5915-00-633-1217
NSN 5905-00-402-2579
NSN 6610-00-195-7517
NSN 6645-01-633-1852
NSN 5999-01-208-5019
NSN 6610-01-238-8712
NSN 6240-00-080-2012
NSN 5895-01-507-7141
NSN 6610-01-100-3662
NSN 5985-01-124-0633
NSN 5915-01-442-8785
NSN 6320-00-310-1080