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 5920-01-444-1207
NSN 6645-00-503-1379
NSN 5945-01-646-1856
NSN 6645-00-574-9712
NSN 6645-00-401-5563
NSN 6110-00-299-3553
NSN 6150-00-399-1431
NSN 7035-01-063-8753
NSN 5999-01-057-1642
NSN 6110-01-494-0394
NSN 6150-01-067-4720
NSN 5996-01-557-5328