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 6110-01-478-9941
NSN 6685-01-095-9129
NSN 5915-01-501-5895
NSN 7035-00-517-8232
NSN 5998-00-967-2500
NSN 6240-01-500-1714
NSN 5925-00-008-4413
NSN 5998-00-206-6613
NSN 6610-01-067-6591
NSN 5905-01-332-1006
NSN 5999-01-491-3615
NSN 5915-01-571-2537