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 6135-01-235-4168
NSN 5965-01-253-5353
NSN 6150-00-045-7158
NSN 5985-01-400-5948
NSN 7035-01-658-1623
NSN 6220-00-140-2304
NSN 5895-01-010-8462
NSN 5915-01-193-5656
NSN 5895-00-878-7768
NSN 6650-00-065-4280
NSN 6145-00-927-2145
NSN 4140-01-103-3377