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 5925-00-666-4753
NSN 6610-01-519-5157
NSN 6650-01-464-3545
NSN 5999-00-521-1151
NSN 6150-01-009-2040
NSN 5960-00-145-3901
NSN 5930-00-948-0031
NSN 5990-01-037-1704
NSN 5855-01-327-2681
NSN 6685-01-023-6764
NSN 5910-00-212-5969
NSN 5990-01-561-0737