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 6150-00-027-9279
NSN 6610-01-269-5437
NSN 5920-01-237-5466
NSN 6220-00-960-5621
NSN 6145-01-310-8597
NSN 5930-00-550-1325
NSN 2925-00-088-6790
NSN 5960-01-379-3947
NSN 6135-01-411-3212
NSN 6320-01-229-2264
NSN 6110-00-663-4054
NSN 6645-01-483-5519