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 7035-01-110-5745
NSN 5915-01-163-9253
NSN 5925-01-487-6830
NSN 5998-01-300-6555
NSN 5895-01-578-0292
NSN 6105-00-452-3855
NSN 6685-01-314-5313
NSN 5996-00-636-4849
NSN 4140-01-181-4485
NSN 5915-01-336-5544
NSN 5930-01-202-2930
NSN 5960-01-397-6173