Cap nuts are hex nuts with a dome top that resembles a crown. The cap serves as a decorative by concealing the threaded end of a fastener or acting as a cover for protruding threads.
Diameter - Thread Count Width Across Flats (A/f) Thickness 3/16-24NC (Coarse) 0.375" 0.335" 1/4-20NC (Coarse) 0.438" 0.402" 5/16-18NC (Coarse) 0.562" 0.484" 3/8-16NC (Coarse) 0.625" 0.52" 1/2-13NC (Coarse) 0.75" 0.563" 5/8-11NC (Coarse) 0.938" 0.826"
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