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 6240-00-075-0445
NSN 6150-01-622-9639
NSN 5975-01-314-7893
NSN 5985-01-448-9550
NSN 7035-01-633-9537
NSN 5965-01-258-5662
NSN 5915-01-281-7383
NSN 2925-01-459-8093
NSN 5855-01-290-3248
NSN 6685-01-393-1280
NSN 6145-00-961-0775
NSN 5960-01-533-5162