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 6610-01-070-6044
NSN 6620-00-010-8190
NSN 6135-01-657-0554
NSN 6150-01-421-4028
NSN 5990-00-114-1570
NSN 5835-01-227-4752
NSN 6685-00-156-3054
NSN 6130-01-614-3945
NSN 5835-01-506-0746
NSN 2925-00-406-4381
NSN 5895-01-429-1255
NSN 5985-01-533-1558