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 6620-01-376-3744
NSN 5996-01-147-6054
NSN 5835-01-286-6499
NSN 5920-00-438-4973
NSN 5998-00-625-9196
NSN 5935-01-362-9704
NSN 6150-00-806-4302
NSN 5905-01-297-4181
NSN 5965-01-543-9997
NSN 6320-01-585-8468
NSN 5925-00-499-9220
NSN 5920-01-390-9426