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 5990-00-811-0841
NSN 6150-01-363-6150
NSN 5985-00-328-8898
NSN 5915-01-542-7891
NSN 5975-01-423-8507
NSN 5855-00-763-2155
NSN 5915-00-959-0521
NSN 6105-01-487-4590
NSN 5985-01-432-2483
NSN 5930-01-437-1303
NSN 5965-00-538-4485
NSN 5950-00-013-7389