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 6135-01-177-3552
NSN 6220-00-199-9401
NSN 5999-00-153-9671
NSN 5945-00-146-8254
NSN 5855-00-247-7219
NSN 6130-00-947-9232
NSN 6105-00-657-8098
NSN 6220-00-502-6380
NSN 6610-00-692-4460
NSN 6220-01-380-6204
NSN 5950-00-880-2000
NSN 2925-01-391-9247