Fine knurl on both bearing surfaces
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.)
Classification: Nuts of iron or steel
NSN 4140-01-225-1411
NSN 6685-00-381-8551
NSN 5915-00-470-8434
NSN 5996-01-142-5638
NSN 6130-01-333-3615
NSN 2925-01-301-1727
NSN 5985-01-303-6363
NSN 5999-00-999-4058
NSN 5920-01-430-5001
NSN 5999-00-599-1705
NSN 4140-00-300-8111
NSN 5910-01-429-0156