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 5950-01-591-4989
NSN 5905-01-282-1270
NSN 2925-00-925-0545
NSN 5895-01-420-5970
NSN 5920-01-459-0516
NSN 5985-01-332-5410
NSN 5905-01-476-7760
NSN 6610-00-913-7069
NSN 6135-00-162-2437
NSN 5855-01-180-5369
NSN 6320-00-004-9158
NSN 6610-01-557-6908