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 5950-01-314-8179
NSN 5930-01-471-0520
NSN 6645-01-522-2357
NSN 5996-01-302-1212
NSN 6220-01-293-5450
NSN 6135-00-057-2005
NSN 5855-01-312-5160
NSN 5960-01-416-6187
NSN 6135-01-236-8603
NSN 5925-01-315-3203
NSN 5999-00-786-9623
NSN 6610-01-412-0058