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 5998-01-163-5558
NSN 5915-00-434-6178
NSN 5920-01-240-2362
NSN 5950-01-654-2679
NSN 6685-00-974-2596
NSN 5965-01-487-4479
NSN 5855-01-217-6857
NSN 5855-00-921-6589
NSN 2925-00-127-7828
NSN 5935-01-063-7990
NSN 6145-01-432-3640
NSN 5990-00-247-0975