Why is the crown screw also known as decorative nails?

Crown screws, also known as decorative nails, are panel decorative screws that are assembled from three elements. Semicircle countersunk head screws + concave meson + PVC washers and snap nuts are used in conjunction. Commonly used carbon steel and stainless steel two materials, generally M5 and M6 two models for more. Crown screws are generally compatible with the use of cassette nuts with a strong decorative. Commonly used sheet metal, chassis cabinets.