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 6150-01-373-9536
NSN 2925-01-250-2731
NSN 6650-00-641-6139
NSN 6150-00-212-3975
NSN 5990-01-575-3275
NSN 2925-01-261-0701
NSN 5996-00-784-3240
NSN 2925-01-553-0181
NSN 6650-01-432-1830
NSN 5999-01-054-4359
NSN 6320-00-004-9158
NSN 7035-00-009-8705