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 5915-01-123-4877
NSN 5925-01-235-7813
NSN 7035-00-585-2113
NSN 5950-01-374-1872
NSN 5996-00-968-6524
NSN 6135-01-607-5478
NSN 5985-01-627-4149
NSN 5945-01-019-6922
NSN 6110-01-283-6957
NSN 6145-00-655-2738
NSN 5999-01-335-6143
NSN 5975-00-331-8200