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 5920-00-340-3002
NSN 6130-01-615-3410
NSN 5910-01-262-6149
NSN 4140-00-482-1969
NSN 4140-01-037-1867
NSN 5835-00-503-2608
NSN 5998-01-504-8476
NSN 6220-00-498-0992
NSN 6320-01-019-1028
NSN 5925-00-874-0986
NSN 6220-01-106-3215
NSN 5925-00-254-2683