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 5960-00-170-6447
NSN 6645-01-138-3855
NSN 6135-00-276-7625
NSN 5915-00-978-1442
NSN 5996-00-675-4823
NSN 5998-00-471-6000
NSN 4140-00-459-9045
NSN 5835-00-958-6231
NSN 5999-00-102-4338
NSN 5950-00-835-0097
NSN 5915-00-570-9289
NSN 6685-00-533-5971