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 6110-01-311-2919
NSN 5975-01-453-8649
NSN 6645-01-444-8918
NSN 5915-00-828-0710
NSN 5996-01-073-2332
NSN 6240-00-065-3703
NSN 5998-00-089-4023
NSN 5960-00-223-8381
NSN 5910-00-988-6904
NSN 5835-00-980-0468
NSN 6620-01-401-5356
NSN 6145-00-290-3859