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 5998-01-242-9913
NSN 6610-00-764-6627
NSN 6220-00-827-0227
NSN 6150-01-350-0086
NSN 6620-00-137-0332
NSN 6685-01-321-3327
NSN 5895-01-347-6940
NSN 5985-00-545-2071
NSN 6685-00-755-6917
NSN 6105-01-421-6925
NSN 5920-01-127-0252
NSN 5960-00-315-0358