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 6135-01-567-0739
NSN 6610-00-133-7868
NSN 5985-00-009-2382
NSN 6320-01-227-2648
NSN 5925-01-191-4285
NSN 5985-01-319-2851
NSN 5975-01-078-5418
NSN 6240-00-566-8371
NSN 5915-01-576-9773
NSN 5996-01-599-8237
NSN 6135-00-613-1068
NSN 6130-01-569-5323