A button head screw is a type of threaded fastener that has a mushroom-shaped head. Like all non-countersunk screws, these threaded fasteners will protrude out of the workpieces in which they are installed.
Truss head screws and pan head screws have a similar non-countersunk, mushroom-shaped head, and they are available in different head recesses. Some have a Philips drive, others have a flat head recess.
Types of Screws
A screw is a type of fastener that has an external thread to attach two pieces of hardware. The threads can either mate with an internally threaded nut or hole, or cut through a soft material.
A screw can be a very strong, inexpensive and easy to install fastener. It can be used to assemble or position different pieces of hardware together, and it is one of the most widely used types of fasteners in the world.
In general, a screw has two main components: the head and the screw drive. The head can be designed to accommodate more than one type of driver, referred to as a combination drive system.
Most screws are slotted, but there are also some types that have both slots and a Phillips head. These types of screws are often referred to as “combo” or “combi-head” fasteners.
Truss Head
The truss head screw is one of the most popular types of fasteners. They are commonly used in applications that require the fastener to be able to securely hold thin materials or membranes.
The wide head of a truss screw prevents the screw from sinking too deep into the material and causing tearing. This makes it a popular choice for fastening sheet metal, and also for covering large holes in delicate materials that would otherwise be exposed to potential tampering.
Truss head screws are available in a variety of sizes and drive types. Some are made from brass, aluminum or copper. Others are made from high-grade stainless steel. They can also be custom ordered in a variety of finishes and colors to match your project.
Pan Head
Pan head screws are threaded fasteners with a mushroom-shaped head that resembles a pan. They are non-countersunk, so they will protrude out of the workpieces in which they are installed after driving them in.
They can be found in a wide range of sizes and head types, including slotted and Philips. They are also available in a number of different finishes, including stainless steel.
The first Harley-Davidson Panhead was introduced in 1948, and it wasn’t long before they became a major part of the postwar motorcycle boom. They had a few design problems, however: The oil system was difficult to regulate, and there was a tendency for top-end oil leaks.
Harley’s engineers addressed these issues by installing aluminum heads, which offered cooler engine performance and eliminated the need for top-end oiling. This also helped reduce noise and maintenance. These improvements made the Panhead a popular choice for Harley owners. Today, it is an icon of American motorcycling.