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 5920-01-259-8616
NSN 6620-01-589-0460
NSN 5925-00-917-3667
NSN 5855-00-472-2055
NSN 5985-01-076-4710
NSN 6645-00-904-2754
NSN 5998-01-319-5031
NSN 6110-01-440-9158
NSN 6685-01-446-1095
NSN 5835-01-453-8935
NSN 5975-01-011-0820
NSN 6150-01-446-1167