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 5835-00-389-2816
NSN 6130-01-079-2844
NSN 6645-01-141-4425
NSN 6220-01-646-2293
NSN 6610-01-257-5808
NSN 6145-01-436-8989
NSN 6620-01-503-6576
NSN 5975-01-319-8212
NSN 5965-01-432-1452
NSN 5950-01-304-0579
NSN 5960-01-578-5537
NSN 6320-00-433-2773