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 5990-00-931-6304
NSN 5925-00-622-2294
NSN 5996-00-438-7532
NSN 5935-00-400-4781
NSN 6685-00-756-9537
NSN 6240-01-597-8430
NSN 5960-00-262-7186
NSN 6145-00-583-3940
NSN 5905-01-502-5577
NSN 5835-01-412-0344
NSN 5996-00-525-1777
NSN 6610-01-056-1335