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 4140-01-138-9929
NSN 5945-01-516-3266
NSN 6135-00-889-1485
NSN 6685-00-907-2813
NSN 5905-01-368-3379
NSN 6240-00-136-2602
NSN 5985-01-254-6138
NSN 6135-00-998-5884
NSN 6685-00-273-1618
NSN 5950-01-334-0024
NSN 5910-01-202-8330
NSN 5965-01-408-9551