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 6610-01-139-2809
NSN 5990-01-364-1942
NSN 6135-00-891-4944
NSN 5985-01-499-2005
NSN 6240-01-384-7231
NSN 5935-01-386-7081
NSN 6150-01-552-8780
NSN 5975-01-634-0678
NSN 6130-01-246-5645
NSN 5920-01-421-9154
NSN 5996-01-452-7888
NSN 6320-01-093-5738