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 5915-00-562-4390
NSN 5985-01-396-7983
NSN 6685-01-175-2083
NSN 6130-01-064-8126
NSN 5855-01-223-0833
NSN 5895-00-908-4758
NSN
NSN 5905-00-472-7795
NSN 5985-01-033-5792
NSN 6135-01-306-6549
NSN 5935-00-755-9684
NSN 6220-01-376-9287