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 6645-00-287-9192
NSN 5975-01-359-1590
NSN 6220-01-312-2678
NSN 5945-01-024-9378
NSN 6610-00-479-0681
NSN 5920-01-604-9045
NSN 5855-00-973-5717
NSN 5965-01-452-4189
NSN 2925-01-004-5627
NSN 5930-01-440-1041
NSN 5835-00-733-9145
NSN 6135-00-809-2148