The Flat Undercut is used instead of the standard flat head for some short sizes. The 100-degree kind enables more shallow countersinking than standard 82-degree flat heads. Hex

The ‘pan’ head is the most commonly used rounded-top screw head. It works well in a range of applications that require a flat-bottomed screw. Hex Washer The difference between trim head screws and flat heads lies in the size of the head. Trim heads are made more like a finishing nail and work very well in that capacity. When you are screwing in a place where the screw head is best hidden, trim head screw with color matched finish will virtually disappear. If you need something even smaller, ask you fastener distributor about sourcing out a trim head line that uses a #1 square head instead of the minimum #2 that is generally used on flat head types. Truss heads are characterized by a curved surface and an extra-wide top. They are often used to prevent tampering., having a lower profile than most round heads GRK is not responsible for product failure caused by the improper use or installation of its own or other building materials. The warranty does not cover damage as a result of alteration, accident, misuse, neglect, reuse, warn building materials or use not in accordance with the Screw Selection Guide.

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The ‘round’ head is less commonly used these days, but it offers a round-surfaced alternative to other screw heads. Round Countersunk With their tiny (6mm diameter) heads, Silva's stainless-steel finishing trim screws provide a neat, professional finish. They are suitable for a wide variety of exterior applications where a discreet screw head is preferred. The Flat 100+ uses a 100-degree angle instead of the standard 82-degree kind. It is an ideal choice for thinner materials that require a flatter head. Flat 100+ Undercut Anyone who's ever driven a screw in knows how annoying cam-out is - when the bit slips out of the screw head as torque increases. It's not only frustrating, but it can also damage the screw head, preventing it from being driven in or out. The improved engagement of the star drive virtually eliminates cam-out and will pull wood components tightly together with ease. The ‘square’ head is a suitable choice for applications that require more torque. It is most often used for switch coverings Truss

Trim head screws are similar to flat head screws in both looks and design. They have a circular head that is intended to finish flush with the surface of the material being fastened. The heads are often formed with nibs to ensure a nicer countersunk finish when the hole was not predrilled. The type of head that your screw has will greatly affect the performance of the fasteners in your application. What that means is you should pay attention to which type of screw or nut and bolt you use. Many are better for use with specific materials, others should be put to use in certain circumstances. One of the more common types of screw seen in a wide variety of applications are trim-head screws and this style provides some unique benefits to your project. Other fasteners are Hex Head Cap Screws and Hex Bolts. A smaller diameter, in addition to a higher profile, than round or pan heads, makes the ‘fillister’ screw head effective for a deeper slot. Flat Fillister Our local delivery covers these postcodes: TN1, TN2, TN3, TN4, TN5, TN6, TN7, TN8, TN9, TN10, TN11, TN12, TN13, TN14, TN15, TN17, TN18, TN19, TN20, ME14, ME15, ME16, ME17, ME18, ME19, ME20.It is identical to a flat head, except for its rounded surface. Countersunk screw head that includes a decorative rounded finish at the top. Often used for switch coverings. Oval Trim The round washer is a screw head which provides a larger bearing surface in applications where a round head is preferred. It is quite similar to the Modified Truss head style. Square (Set Screw)

The ‘oval undercut’ is ideal for shorter screw lengths which require longer thread grip and more shallow countersinking. Fillister A star drive bit is included free with each box. We recommend you buy a few spares, especially if you are working on a big project.

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Binding screws are also used for other kinds of projects; they are often used to hold together large manuals, for bookbinding, and in leather products. Trim