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 5855-01-601-3361
NSN 5999-01-094-5956
NSN 5915-01-238-8593
NSN 6620-01-309-1287
NSN 5950-00-683-8304
NSN 6610-01-263-8999
NSN 5905-01-199-1093
NSN 6645-01-466-9477
NSN 6685-01-004-0708
NSN 5855-00-079-2370
NSN 5835-01-553-6772
NSN 5910-01-352-1053