12 Point screw

A 12 point flange bolt is a type of bolt that has a 12 sided or point head, as well as an integral washer-like flange at the base of the head. The flange provides a larger bearing surface for the bolt head, which distributes the clamping load over a wider area and helps to prevent the bolt from loosening over time.

12 point flange bolts are often used in high-stress applications where vibration resistance and a secure connection are critical, such as in automotive and racing applications, heavy machinery, and industrial equipment. They are also commonly used in applications where accessibility is limited, as the 12 point head allows for the use of a socket wrench or hex key from a range of angles.

The flange on the bolt head can be serrated to provide additional grip and help prevent loosening, or smooth for a more streamlined appearance. 12 point flange bolts are available in a range of sizes and materials to suit various applications and environments.

Uses of 12 points flange bolt

12 point flange bolts are used in a variety of applications where a strong and secure connection is essential. Here are some common uses of 12 point flange bolts:

Automotive: They are commonly used in automotive applications, such as engine components, exhaust systems, suspension systems, and brakes.

Heavy Machinery and Equipment: 12 point flange bolts are used in heavy machinery and equipment, such as construction equipment, agricultural machinery, and industrial equipment.

Racing: They are popular in racing applications, such as drag racing and other high-performance motorsports, where vibration resistance and a secure connection are crucial.

Aerospace: They are also used in the aerospace industry, where their high strength and vibration resistance make them suitable for use in aircraft engines and other critical components.

Industrial: They are used in a variety of industrial applications, such as power generation equipment, oil and gas processing, and chemical processing.

Materials for 12 points flange bolt

12 point flange bolts are available in a variety of materials, each with their own unique properties and strengths. Here is a list of ANSI, ASME, ASTM, and DIN standard materials used to make 12 point flange bolts, separated by material type, along with some specific grades:

1. Steel:

• ANSI/ASME B18.2.1 and B18.2.3.9M specify steel 12 point flange bolts. The most common grades used are Grade 8 and Grade 9, which have high tensile strength and are suitable for high-stress applications.
• ASTM A325 and A490 specify high-strength steel 12 point flange bolts for use in structural applications.

2. Stainless Steel:

• ANSI/ASME B18.2.1 and B18.2.3.9M also specify stainless steel 12 point flange bolts. The most common grades used are 18-8 (304) and 316, which have excellent corrosion resistance and are suitable for use in harsh environments.
• ASTM F593 specifies stainless steel 12 point flange bolts for general and architectural applications. The most common grades used are 304 and 316.

3. Titanium:

• ASTM B348 specifies titanium 12 point flange bolts. The most common grades used are Grade 2 and Grade 5, which have high strength-to-weight ratios and excellent corrosion resistance.

4. Inconel:

• ASTM B166 specifies Inconel 12 point flange bolts. The most common grades used are Inconel 625 and Inconel 718, which have high strength and excellent resistance to corrosion and high temperatures.

5. Aluminum:

• ANSI/ASME B18.2.1 specifies aluminum 12 point flange bolts. The most common grade used is 2024-T4, which has high strength and is suitable for use in aerospace and automotive applications.

Overall, the choice of material for 12 point flange bolts depends on the specific application requirements, including factors such as strength, corrosion resistance, and temperature resistance. It is important to consult the relevant standards and specifications when selecting the appropriate material and grade for a particular application.