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 6645-01-101-2877
NSN 5975-01-173-2511
NSN 5960-01-549-4826
NSN 5975-01-041-2429
NSN 6150-01-272-8141
NSN 6220-01-283-1294
NSN 6145-00-135-1436
NSN 5905-01-503-2608
NSN 6145-00-961-0775
NSN 5930-01-191-0111
NSN 5945-00-987-8435
NSN 5965-00-665-2156