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 5925-00-217-6381
NSN 5985-01-417-8860
NSN 6145-01-429-8529
NSN 6110-01-130-2975
NSN 5950-01-184-9395
NSN 6150-01-469-6398
NSN 5965-01-474-5654
NSN 5855-01-035-2866
NSN 5975-01-486-0469
NSN 6320-01-085-8845
NSN 6240-01-160-8975
NSN 6685-01-655-3436