Hexagon Socket Flat Point Set Screws

The hexagon socket flat point set screw is a kind of fastener with a hexagon socket shape and a flat end at the head. The following will introduce it in detail from the aspects of its standard specifications, structural features, application fields, materials and surface treatments:

1. Standard Specifications of Hexagon Socket Flat Point Set Screws

National Standard: The national standard of China for "Hexagon Socket Flat Point Set Screws" has the standard code GB/T 77-2007, which came into effect on December 1, 2007 and replaced the GB/T 77-2000 standard.

International Standard: The adopted international standard number is ISO 4026:2003, and the adopted standard name is Hexagon Socket Flat Point Set Screws. The degree of adoption is MOD (Modified Adoption).

2. Structural Features of Hexagon Socket Flat Point Set Screws

Hexagon Socket Design: The head has a hexagon socket groove, and a hexagon wrench with a matching size is required for installation and disassembly. This design can provide a large torque transmission, making it more convenient and labor-saving to tighten and loosen the screw. At the same time, it can effectively prevent the wrench from slipping.

Flat End Design: The end of the screw head is flat. When tightening, the flat end can fully contact the surface of the connected part, providing a large contact area, so that the pressure can be evenly transmitted, avoiding damage to the surface of the connected part. It is suitable for the situation where the fixed contact surface is flat.

3. Specification Dimensions of Hexagon Socket Flat Point Set Screws

Thread Diameter: Commonly used thread diameters include M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M16, M18, M20, etc.

Screw Length: The length specifications are relatively rich, generally including 2, 3, 4, 5, 6, 8, 10, 12, 16, 18, 20, 25, 30, 35, 40, 45, 50, 60, etc.

4. Application Fields of Hexagon Socket Flat Point Set Screws

Mechanical Equipment Assembly: In the assembly of mechanical equipment in fields such as aviation, aerospace, automotive, and machinery manufacturing, it is often used to fix components and connect mechanical structures, such as the fixation of engine components and the positioning of drive shafts.

Electronic Equipment Manufacturing: In the field of electronic equipment manufacturing, it is often used to fix circuit boards and connect various electronic components, such as the fixation of chips on computer motherboards and the connection of internal components of mobile phones.

Hardware Product Assembly: It is also widely used in the assembly of hardware products such as furniture, doors and windows, and cabinets, such as the fixation of furniture connectors and the installation of door and window hinges.

Other Fields: It can also be used in various engineering projects and construction fields, such as fixing steel structures, connecting pipelines, and installing equipment.

5. Material Types of Hexagon Socket Flat Point Set Screws

Carbon Steel: It has high strength and hardness, and the price is relatively low. It is suitable for occasions with general strength requirements and non-corrosive environments.

Alloy Steel: It has higher strength and wear resistance, and can withstand greater loads and impact forces. It is often used in mechanical equipment with high requirements for strength and durability.

Stainless Steel: It has good corrosion resistance and oxidation resistance, and is suitable for corrosive environments such as wet and acidic or alkaline conditions, such as in fields like food processing equipment, medical devices, and chemical equipment.

Copper and Copper Alloys: It has good electrical conductivity, thermal conductivity and corrosion resistance, and is often used in fields such as electrical equipment and instruments, but its strength is relatively low.

6. Surface Treatments of Hexagon Socket Flat Point Set Screws

Electroplating: Metals such as zinc, copper, nickel, chromium, and copper-nickel alloy can be plated on the surface of the screw to improve the corrosion resistance and appearance of the screw. Common electroplating colors include blue-white zinc, multicolored zinc, black zinc, etc.

Hot Dip Galvanizing: Immerse the carbon steel parts in a galvanizing bath with molten zinc at a temperature of about 510°C, so that an iron-zinc alloy is formed on the surface of the steel parts, thereby improving corrosion resistance. The standard average thickness is 54um, and the minimum thickness is 43um.

Blackening Treatment: Also known as boiling black or bluing, a black oxide film is formed on the surface of the screw through a chemical reaction, which can improve the rust resistance of the screw and make the appearance more beautiful.

Phosphating Treatment: A phosphate film is formed on the surface of the screw, which can improve the wear resistance, corrosion resistance and lubricity of the screw. It is often used in occasions where subsequent coating or lubrication treatment is required.

7. Installation and Disassembly of Hexagon Socket Flat Point Set Screws

Installation: First, select a suitable hexagon socket wrench according to the specification of the screw. Insert the wrench into the hexagon socket groove of the screw, and then rotate the wrench in a clockwise direction to tighten the screw to the required torque value. During the tightening process, pay attention to controlling the torque to avoid damage to the screw or deformation of the connected part caused by over-tightening.

Disassembly: Use a hexagon socket wrench to rotate the screw in a counterclockwise direction to loosen and remove it. If the screw is rusted or too tightly fastened to be removed, methods such as using a rust remover or heating can be used to help loosen the screw.