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 4140-01-212-8286
NSN 5998-01-406-3924
NSN 7035-01-227-2546
NSN 5935-01-218-8326
NSN 2925-00-233-5644
NSN 6130-01-503-8933
NSN 5950-01-215-1260
NSN 5985-01-099-9613
NSN 5996-01-207-2724
NSN 4140-01-421-0071
NSN 6105-01-555-8995
NSN 6650-01-534-8357