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 6135-00-686-4777
NSN 5990-01-243-4233
NSN 5950-01-577-6420
NSN 5855-00-903-4305
NSN 5925-00-468-2757
NSN 2925-01-197-7864
NSN 6110-00-984-4273
NSN 6145-01-475-5279
NSN 5910-01-135-8667
NSN 5960-00-034-7925
NSN 5895-01-463-3357
NSN 6130-00-764-5840