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 6320-00-857-4073
NSN 5855-01-613-5048
NSN 5855-01-333-0969
NSN 5855-00-361-0167
NSN 5920-00-060-3290
NSN 6645-01-510-4815
NSN 7035-01-145-9164
NSN 6145-01-381-1303
NSN 5998-01-395-2438
NSN 5990-00-263-1289
NSN 6220-01-494-0572
NSN 5990-00-296-4825