What are Socket Head Cap Screws

Socket head cap screws, commonly referred to as Allen bolts or Allen screws, are threaded fasteners recognized for their distinctive cylindrical head featuring a recessed hexagonal socket (Allen socket) on the head’s top. These screws are widely used due to their durability, high tensile strength, and ease of tightening using an Allen wrench or hex key.

Characteristics of Socket Head Cap Screws:

1. Head Design: The cylindrical head features an internal hexagonal socket, allowing for secure tightening using an Allen wrench.

2. Threaded Shaft: The entire length of the shaft is threaded, offering consistent and strong fastening.

3. Drive Types: Available in various drive types, predominantly the standard hex socket (Allen), but also Torx (star) and other specialized drives.

4. Materials: Manufactured in different materials such as alloy steel, stainless steel, brass, and aluminum to accommodate varying application requirements.

Advantages of Socket Head Cap Screws:

1. High Tensile Strength: Known for their high tensile strength, making them suitable for applications requiring robust fastening.

2. Compact Head Profile: The compact head design enables usage in confined spaces where larger-headed screws may not fit.

3. Resistance to Loosening: Provides secure and reliable fastening, reducing the risk of loosening over time.

4. Corrosion Resistance: Available in materials with different levels of corrosion resistance, suitable for diverse environments.

Applications of Socket Head Cap Screws:

– Industrial Machinery: Used in machinery, automotive assemblies, and industrial equipment requiring strong and reliable fastening.

– Aerospace and Defense: Widely utilized in aerospace, military, and defense applications due to their strength and dependability.

– Construction and Engineering: Employed in construction, infrastructure, and engineering projects demanding robust and secure fastening solutions.

the specifications for socket head cap screws

1. ASME B18.3:

– Specification: ASME B18.3 is a standard that covers dimensional requirements for socket head cap screws in imperial sizes (inch-based).
– Features: Specifies dimensions such as head diameter, head height, thread length, and thread pitch for socket head cap screws.

2. DIN 912 / ISO 4762:

– Specification: DIN 912 is the German standard for socket head cap screws, also standardized under ISO 4762, which is the international equivalent.
– Features: Defines metric dimensions for socket head cap screws including head diameter, head height, thread length, and thread pitch.

3. DIN 7984:

– Specification: DIN 7984 is a German standard for low head socket cap screws.
– Features: Specifies metric dimensions for low head socket cap screws including a lower profile head compared to standard socket head cap screws.

4. DIN 6912:

– Specification: DIN 6912 is a German standard for hexagon socket set screws with flat point.
– Features: Provides specifications for set screws with a flat point in metric dimensions, particularly focusing on the end geometry.

These specifications define the dimensional characteristics, tolerances, and requirements for socket head cap screws, ensuring consistency and interchangeability within their respective standard systems. They cover various aspects such as head shape, dimensions, thread details, material properties, and specific applications for different types of socket head cap screws.

Sino Special Metal’s Supply:

Sino Special Metal offers a wide array of socket head cap screws in various materials, sizes, and drive types. These screws conform to precise standards, ensuring quality, reliability, and performance across diverse industries and applications.

In essence, socket head cap screws are durable fasteners recognized for their compact head design and secure hexagonal socket drive. Sino Special Metal provides a range of socket head cap screws suitable for different industrial needs, offering quality and tailored solutions.