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 6145-00-130-3558
NSN 5985-00-483-0133
NSN 6135-01-514-2668
NSN 5975-00-149-0758
NSN 5960-01-212-4227
NSN 2925-00-636-4026
NSN 5925-01-321-8898
NSN 7035-00-215-3272
NSN 5975-01-601-6658
NSN 5950-01-372-0997
NSN 5920-01-415-6546
NSN 5855-01-029-8733