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 5915-01-432-7593
NSN 4140-01-251-4367
NSN 5945-01-333-4938
NSN 5905-00-912-1843
NSN 5960-01-601-5565
NSN 6110-01-421-2714
NSN 5998-01-324-5587
NSN 5996-01-185-5411
NSN 5905-01-168-6903
NSN 6135-01-511-1975
NSN 5999-00-585-3338
NSN 5905-01-250-4076