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 5920-01-542-8710
NSN 5985-01-188-7903
NSN 5905-00-926-2905
NSN 6135-01-615-6027
NSN 6320-01-449-1014
NSN 6645-01-469-8778
NSN 5999-01-008-1418
NSN 5920-01-390-3996
NSN 5960-00-078-5407
NSN 5996-01-045-4595
NSN 5996-01-422-3087
NSN 5965-00-232-4643