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 6650-01-115-8431
NSN 5930-01-426-0080
NSN 6320-01-322-8340
NSN 5905-01-435-7233
NSN 5855-01-472-3963
NSN 6610-01-389-3082
NSN 5960-01-370-4285
NSN 5930-00-322-6450
NSN 5930-01-445-0504
NSN 5996-01-431-9335
NSN 6685-01-030-7451
NSN 6130-00-263-7869