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 5945-01-435-7411
NSN 5990-01-207-5336
NSN 5905-01-105-9904
NSN 5975-01-312-8194
NSN 5905-01-301-3847
NSN 5965-00-072-9942
NSN 6150-01-322-1167
NSN 5985-01-434-7999
NSN 2925-01-311-7840
NSN 5855-01-614-6491
NSN 6130-00-830-2701
NSN 6610-01-406-4985