slotted flat countersunk head machine screw

Made of plastic, these caps are available in standard colors that match commonly used plastic laminates and wood. If you are using flat heads screws in finish work, consider using a flat head screw cover (also known as a 'beauty cap') to hide the head (not all drive styles will accept screw covers). The advantage is that little or no part of the head protrudes beyond the surface of the material.

Unless the material is very soft, flat and oval heads require a countersunk hole. Sometimes features are combined, as in the case of slotted hex, hex washer, slotted hex washer and round washer head designs.Ĭountersunk designs mainly consist of flat, oval and bugle heads. This style includes: binding, button, cheese, fillister, flange, hex, pan, round, socket and low socket, square and truss heads (binding head is occasionally referred to as binder head). Non-countersunk heads-where the head is fully exposed-encompass the largest variety. There are two basic designs: countersunk and non-countersunk. Understanding the differences will help you decide which style to choose.

Sometimes the style serves a functional purpose, and sometimes it's more decorative in nature. Screw type fasteners are manufactured with different head styles. The second chart below is a US fraction to metric mm for the more common sizes up to 4'.Fastener Tech Data | Understanding Series Introduction That is often found when trying to match a screw size using Digital Calipers (Inch Decimal to Screw Size) or drill a hole (Screw size to Nearest Fraction) for your project. It is very helpful to know the decimal equivalent for a US screw size you have.

Slotted flat countersunk head machine screw