"What’s the difference between a Truss Head and a Pan Head" is one of the most common questions we are asked... Read More
Pan heads are dome-shaped and protrude above the surface of the wood. The flat surface under the head is called the bearing surface and this head style is often used to attach metal or plastic hardware parts to wood. The higher head profile provides a deep recess that makes this head style easier to drive. The flat bearing surface also reduces over-penetration when the head is used directly against wood surfaces.
This head style is very similar to the pan head but has a lower profile and a slightly larger bearing surface. Because the head profile is lower, the recess is shallower and sometimes is more difficult for a worker to keep the drive tool engaged in the recess. Some drawer slides require a lower head height so the screw head will not interfere with the passage of the slide roller. The lower head is also less obtrusive when seen in the finished product. Most 8-32 machine screws used for attaching drawer knobs and pulls have a truss head design.