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 6650-01-232-4243
NSN 5960-00-275-7497
NSN 2925-00-236-9986
NSN 6320-00-343-1798
NSN 5895-01-063-6938
NSN 5915-01-120-9882
NSN 6130-01-359-8375
NSN 6135-00-992-8750
NSN 5998-01-530-2764
NSN 6220-01-104-9679
NSN 5945-00-989-4100
NSN 5990-01-142-0538