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 6240-01-198-3897
NSN 5915-00-060-0077
NSN 5985-01-578-3314
NSN 6135-01-483-5269
NSN 5895-00-356-0179
NSN 5999-01-401-5322
NSN 5960-01-452-1907
NSN 5999-01-159-7034
NSN 7035-00-445-9657
NSN 5855-01-280-9735
NSN 5965-00-246-2182
NSN 6645-01-500-0827