The button head screw is a versatile fastener used across diverse industries due to its strength, durability and aesthetic appeal. They’re often used for visible installations where a finished look is preferred or when countersinking isn’t an option. They’re also commonly found in industrial production lines and assembly applications where a streamlined finish is important for efficiency.
The head of a button head screw is domed with a wide bearing surface that’s less likely to snag or damage materials than a hex socket cap screw. They also have a lower profile than other types of cap screws. This makes them ideal for confined spaces and applications where space is limited.
A variety of different thread systems are used worldwide but the ISO metric screw thread preferred series has largely replaced other older systems like the Whitworth or BA system (British Association). Screws are typically identified by their diameter in millimeters and by the number of rotations they require to advance one mm. The drive style—or drive recess—of a screw is also important to note. Most screws have a slotted head but they can also be found with Phillips, hex, 6-lobe or Torx drives.
Button head socket cap screws are manufactured using a variety of materials and finished with different processes, including electroplating with zinc or applying black oxide. They’re also typically coated to resist corrosion and protect the screws from exposure to abrasive environments and chemicals. This coating protects the fasteners and increases their lifespan, ensuring they provide high-performance and quality results. button head screw