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 6150-01-520-4862
NSN 6650-00-989-1103
NSN 6240-01-190-9523
NSN 5965-00-920-0455
NSN 6145-00-269-4271
NSN 6130-01-438-0399
NSN 5975-00-233-6301
NSN 6610-01-220-5262
NSN 6650-01-523-1686
NSN 5920-00-333-9977
NSN 6145-01-244-6356
NSN 5996-00-161-0148