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 5998-01-062-2149
NSN 6110-01-443-3785
NSN 5855-01-282-4881
NSN 5855-00-610-4052
NSN 5990-01-227-6526
NSN 5950-01-583-1265
NSN 6650-01-037-1948
NSN 5985-01-159-4569
NSN 6620-00-252-6425
NSN 5950-00-610-7785
NSN 5905-01-556-3478
NSN 6145-00-130-3558