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 6145-01-366-1367
NSN 6650-01-531-6738
NSN 5930-00-952-1900
NSN 5990-01-658-3102
NSN 6135-01-116-3385
NSN 6110-00-104-4341
NSN 5855-01-580-0645
NSN 5945-01-207-1248
NSN 5910-01-207-2703
NSN 5960-01-399-4327
NSN 5920-01-464-8480
NSN 5835-01-225-0372