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 5925-01-634-0664
NSN 6130-01-258-6592
NSN 6685-01-107-4571
NSN 6145-01-133-9593
NSN 5999-01-477-5456
NSN 6150-00-232-6568
NSN 5985-01-392-1473
NSN 5996-00-456-0895
NSN 6105-01-019-0663
NSN 5935-01-512-8747
NSN 5975-01-275-2767
NSN 5975-01-194-3419