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 6320-01-556-2011
NSN 5935-00-250-7457
NSN 6610-00-841-8221
NSN 6135-00-087-5300
NSN 4140-01-076-6124
NSN 5895-01-536-5186
NSN 2925-01-248-6028
NSN 6645-00-927-8735
NSN 5910-01-607-6388
NSN 5935-00-153-0012
NSN 6150-00-993-1868
NSN 6240-01-124-5309