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 6145-01-175-9358
NSN 5920-01-528-7717
NSN 5985-00-909-5968
NSN 2925-01-468-7073
NSN 6685-01-210-8175
NSN 6610-00-978-5133
NSN 5990-00-450-9872
NSN 5996-01-442-5218
NSN 6320-00-583-3104
NSN 6135-01-168-2944
NSN 5855-01-569-4057
NSN 5935-01-157-5856