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 5985-00-785-6872
NSN 5920-01-487-5516
NSN 5935-01-196-5673
NSN 6610-01-149-1465
NSN 5975-01-357-4238
NSN 6130-01-406-7385
NSN 6130-01-025-4370
NSN 5985-01-145-4422
NSN 5855-00-177-3529
NSN 5950-01-157-8144
NSN 5930-00-808-9425
NSN 6145-01-374-1899