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 6240-00-357-0139
NSN 5996-01-304-1088
NSN 7035-00-834-2090
NSN 5905-01-531-8303
NSN 6220-01-616-2029
NSN 4140-01-559-3291
NSN 6130-01-046-2466
NSN 5895-01-271-1139
NSN 5950-01-259-8630
NSN 5905-01-578-6998
NSN 6135-00-998-5884
NSN 5999-01-509-3134