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 5895-01-246-4250
NSN 5915-01-497-4423
NSN 5915-01-329-4330
NSN 5935-01-496-9997
NSN 6610-01-612-4611
NSN 5925-01-056-5127
NSN 5915-01-529-4896
NSN 5975-00-361-7793
NSN 5855-01-277-1663
NSN 5915-00-462-3748
NSN 6240-00-852-4870
NSN 7035-01-391-7470