Carbon Steel Weld Metal Screw UNC 5/16-18 Dacromet Coated Heavy Duty Connectors For Mining Engineering

Carbon Steel Weld Metal Screw UNC 5/16-18 Dacromet Coated Heavy Duty Connectors For Mining Engineering

 
 
1,Description:

I. Key Types of Screws Commonly Used in Welding
Welded screws are fasteners secured to a base material via methods such as arc welding or resistance welding, and are primarily divided into the following three categories:

1. Welded Studs (Stud Welding Studs)

- Material: Typically carbon steel (e.g. Q235), stainless steel (e.g. 304/316) or aluminium alloy.

- Specifications: Diameter range M3–M24, length 10–200 mm (refer to ISO 13918).

- Characteristics: Featuring a welding stud at one end, these are welded instantly at high temperatures using specialised welding equipment, ensuring high efficiency and consistent strength. They are commonly used in automotive chassis and steel-framed buildings.

2. Weld Nuts

- Types: Include projection weld nuts, resistance weld nuts and plug weld nuts.

- Materials: Galvanised carbon steel or stainless steel, offering high corrosion resistance.

- Applications: M4–M12 sizes are most commonly used and are suitable for joining thin sheets, such as sheet metal components and enclosures.

3. Weld Bolts

- Design: The head features a flange or boss, and the welding surface is specially treated (e.g. grooved) to enhance bonding strength.

- Strength grades: Grades 4.8 to 10.9 (in accordance with the GB/T 3098.1 standard), suitable for heavy machinery or bridge engineering.

2,Applications:

This UNC 5/16-18 carbon steel weld screw is a heavy-duty industrial fastener designed for harsh working conditions of mining engineering and construction machinery equipment installation, adopting high-strength carbon steel with enhanced quenching and tempering treatment to improve overall structural toughness and load-bearing capacity. The American standard 5/16-18 UNC coarse thread design provides ultra-high locking friction, which can effectively resist mechanical loosening caused by severe vibration, heavy load impact and frequent equipment operation in mining and construction scenarios. The surface is coated with high-performance Dacromet anti-corrosion coating, which has far stronger salt spray resistance, acid and alkali corrosion resistance than traditional electroplating processes. The Dacromet coating features uniform coverage, strong adhesion and no hydrogen embrittlement, avoiding fastener fracture failure caused by harsh underground mining and outdoor construction environments. The product has excellent welding adaptability, with firm welding spots and strong integration with mechanical equipment base materials, able to bear long-term heavy mechanical load and complex structural stress. It can resist erosion of sediment, industrial wastewater and corrosive gas in mining engineering, maintaining stable fastening performance in high-dust and high-humidity working environments. After strict mechanical tensile and fatigue resistance tests, this heavy-duty weld screw fully adapts to the high-intensity operation requirements of construction and mining engineering machinery.

Available in small packing, carton packing, or pallet configurations to meet your shipping and storage requirements.

Manufacturer Information

Manufactured by JIA SHAN Hardware Company with strict quality control measures and pre-shipment inspection.