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 5920-01-593-9615
NSN 5965-00-722-7574
NSN 5925-01-509-4582
NSN 5920-01-421-0291
NSN 6610-01-289-5784
NSN 5985-01-548-3470
NSN 5915-00-182-8068
NSN 5915-00-446-9136
NSN 5985-01-357-1398
NSN 5950-01-110-5190
NSN 5895-00-644-5712
NSN 6240-01-371-3436