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 5935-01-534-9996
NSN 6645-01-421-4007
NSN 6320-01-411-1353
NSN 6135-01-046-6803
NSN 6130-01-616-8720
NSN 5915-01-031-4891
NSN 6145-00-111-3902
NSN 6130-00-565-7238
NSN 2925-01-359-9818
NSN 6220-01-435-0198
NSN 5975-01-438-1819
NSN 7035-00-890-7649