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 2925-00-225-5386
NSN 6620-00-057-2764
NSN 6610-01-391-6781
NSN 5998-00-492-0226
NSN 5925-00-975-7105
NSN 5950-00-066-2474
NSN 6320-00-553-8427
NSN 5945-00-222-5994
NSN 5999-01-032-0307
NSN 5915-01-124-4016
NSN 5975-01-341-4141
NSN 4140-01-396-5590