UNC American British External Hexagonal Screw External Hex Hexagon Head Screw

Dear Customers,We understand the various concerns you may have when making a purchase decision. To ensure a worry-free shopping experience, we promise to provide you with comprehensive protection.

🔍 Sample Preview
Before production, we will provide samples for your inspection to ensure the product meets your expectations.

🌐 Global Logistics Partnerships
We have established partnerships with multiple international logistics companies to ensure your goods are delivered quickly and safely.

🛒 Hassle-Free Return Policy
If you are not satisfied with the product, as long as it meets our return conditions, you only need to contact us, and we will provide you with convenient return services.

📏 Customization Service
We offer customization services based on blueprints. Whether it's specific dimensions or special requirements, we can tailor-make it for you.

Choose us, and you choose peace of mind and trust. Place your order now and enjoy your exclusive shopping experience!

Fasteners are a class of mechanical parts that are widely used for fastening connections. In a variety of machinery, equipment, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, meters and supplies, etc., can be seen above a variety of fasteners. It is characterized by a wide variety of specifications, performance and use of different, and standardization, serialization, generalization of the kind of degree is also very high.

fasteners commonly used testing equipment

Fastener development and design is the most important part of the quality control, from the feed to the finished product shipments have several major gates, these major gates have different inspection methods. First of all, the incoming material is related to the appearance, size, elements, performance, harmful substances testing, etc.; the process is more appearance, size, knocking test, forging line; heat treatment is more appearance, hardness, torque, tensile, metallurgical, etc.; the surface treatment is more hydrogen embrittlement test, plating, salt spray, etc., including the shipment of a harmful substances testing. In the size, appearance testing, the common is the secondary element, contour measuring machine, three coordinate measuring machine, image sorting machine; mechanical and chemical testing, mainly hardness machine, tensile machine, metallurgical microscope; material testing, there is a spectral analyzer, salt spray testing machine.

it usually includes the following 8 types of parts:

1. bolts: 2. studs: 3. nuts: 4. wood screws: 5. Washers: 6. Retaining ring: 7. Pins: 8.Rivets:

• Established in 1990, QingSong is a professional fastener manufacturer with 33 years' experience in production and R&D.
• Over the years, we have always been committed to providing our customers with high quality products and good service.
• We can produce and sell all kinds of standard fasteners and also customize all kinds of non-standard fasteners.