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 6645-01-316-4900
NSN 6150-01-163-5448
NSN 5855-01-264-8599
NSN 6610-00-715-2776
NSN 5950-01-430-5502
NSN 5975-01-217-6922
NSN 6220-01-175-5518
NSN 6240-01-603-0143
NSN 6240-01-302-6537
NSN 5920-01-042-9351
NSN 5960-00-289-6591
NSN 5999-01-302-4823