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 6645-01-366-5033
NSN 5985-01-431-1487
NSN 6150-01-147-0370
NSN 6645-00-485-9889
NSN 6150-01-395-2112
NSN 6685-01-259-8527
NSN 6320-01-481-7322
NSN 6620-00-707-4195
NSN 6110-01-090-9906
NSN 6135-00-660-8654
NSN 5925-01-050-8410
NSN 6135-00-495-6862