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 6145-01-197-6921
NSN 5999-00-138-0112
NSN 5930-01-564-8975
NSN 7035-01-323-0164
NSN 7035-01-266-3490
NSN 5945-00-170-4160
NSN 6110-01-511-0201
NSN 5960-01-499-3544
NSN 6110-01-354-2885
NSN 6135-00-416-2898
NSN 6220-00-595-6954
NSN 5960-01-347-6791