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 5925-00-368-1291
NSN 4140-01-650-6367
NSN 6240-01-054-2289
NSN 6145-01-146-4106
NSN 5950-01-131-9994
NSN 5965-01-033-9352
NSN 6620-01-216-4901
NSN 4140-01-004-0566
NSN 5855-00-494-9581
NSN 5999-01-025-6686
NSN 6685-00-720-3525
NSN 6110-00-881-4195