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 5985-01-478-1126
NSN 5920-00-594-3124
NSN 6130-01-123-9041
NSN 4140-01-057-2915
NSN 5915-01-611-3552
NSN 5999-01-032-4800
NSN 5990-01-525-2250
NSN 5998-00-336-2396
NSN 6685-01-236-4285
NSN 5998-00-079-3553
NSN 6150-01-512-4979
NSN 5950-01-127-1928