Carbon steel socket screws are a type of high-strength fastener, available in various head styles and grades.
They are typically finished with black oxide or zinc plating for corrosion resistance.
Carbon steel socket screws are available in several configurations and strength grades to suit different mechanical property requirements.
- Socket Head Cap Screws: These are the most common type, featuring a cylindrical head and an internal hex drive (Allen key). They are ideal for use in confined areas.
- Socket Button Head Screws: These have a lower, rounded head profile and are generally heat-treated to a material strength grade of 10.9.
- Socket Countersunk Head Screws: These have a flat head designed to sit flush with the surface of the material.
- Socket Set Screws: These are headless screws, used to secure an object within or against another object (e.g., a shaft and sleeve).
Common strength grades for carbon steel socket screws are:
- Grade 10.9: Provides higher tensile strength and is frequently used in automotive and engineering applications.
- Grade 12.9: This is a high-tensile grade, made from alloy carbon steel, and is used when maximum strength and high mechanical properties are required.
