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 5996-00-845-8990
NSN 4140-01-095-6169
NSN 6240-00-220-5333
NSN 5965-00-874-7795
NSN 5855-00-318-7185
NSN 5915-01-605-7455
NSN 5975-01-240-3256
NSN 4140-00-277-6285
NSN 6685-00-181-6194
NSN 6110-00-054-2527
NSN 5960-01-170-4057
NSN 5935-01-129-3239