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 5915-01-336-0308
NSN 6220-00-991-5519
NSN 5950-01-322-9494
NSN 5910-01-325-7934
NSN 5855-00-089-3974
NSN 6685-01-295-3256
NSN 5920-01-281-7354
NSN 5999-01-273-0151
NSN 5945-01-162-8093
NSN 5975-00-380-5753
NSN 6220-01-126-1909
NSN 2925-01-364-7926