Socket Head Cap Screw Vs Button Head Cap Screw
When it comes to choosing a screw for your application, it is important to consider factors like strength, durability and aesthetics. Two of the most common types of screws that are used in applications requiring both strength and a neat appearance are socket head cap screws and button head socket caps. While they may seem similar, there are differences between these two fasteners that make one more appropriate for specific applications than the other.
Socket head cap screws feature a flat top with a hexagonal center recess that is tightened using an Allen wrench or hex key. They are typically made from materials such as stainless steel, which offer resistance to corrosion and rust over time. These screws are also often used in applications requiring close tolerances and can be tightened with little space around them.
A recessed hexagonal socket allows for an internal wrench to be used to tighten the screw, which is often more convenient than using a hex key. The head also has a projecting collar that acts as a washer, dispersing the load of the screw across a larger area and helping to prevent loosening due to vibration. This type of screw is often used in applications requiring a high level of strength, such as machinery and automobiles.
The lower, domed head of button head socket caps offers a finished appearance that is more aesthetically pleasing than the squared, flat head of standard socket head cap screws. With a lower profile, they are ideal for applications with limited clearance and can be tightened with less space required than traditional socket screws. They are also often used in lighter duty applications because of their higher tensile strength.
These fasteners are commonly used in a variety of applications, such as tooling, metal stamping dies, plastic injection molds and hand and power tools. They can also be used in projects where safety is a concern, as the round head design can help prevent them from snagging on moving equipment.
These screws are available in various lengths and thread options, including coarse and fine thread and metric sizes. They are usually manufactured from alloy or stainless steel to meet the specifications outlined by ASME B18.3 and DIN 7380. They are also available in black oxide, zinc and stainless finishes. button head cap screw