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 5905-01-352-9835
NSN 5996-01-391-4529
NSN 5925-01-301-4392
NSN 6110-00-250-5949
NSN 6685-00-663-9000
NSN 5915-00-304-8195
NSN 5945-01-630-2480
NSN 6645-00-955-7997
NSN 6145-01-536-4535
NSN 5835-01-478-0157
NSN 5990-00-594-7291
NSN 6130-01-158-6139