IFI 148 Type U3 Projection Weld Studs

Weld Studs

Threaded weld studs and screws allow the weld screw to be welded to or through a metal surface. The product's specific design also allows the screw or stud to be effectively welded within channels and other confined spaces. Weld fasteners are available in various materials, types, and sizes. Headed weld studs like these can be used in light and heavy-duty applications.

Juxin Fasteners provides premium threaded weld studs (weld screws) in several sizes and dimensions for all your project needs. These unique fasteners feature advanced strength (when compared with CD studs) and exceptional dependability. Additionally, our ring weld projection studs can save significant time and money over other, more demanding hand-welding processes. We provide you with the best weld fastener options at competitive industry prices.

Material: Steel with a carbon content of not more than 0.25% and with weldability. No easy-cutting steel shall be used.

Surface treatment: ① without treatment; ② galvanized passivation

Size and shape of the convex weldment: the height difference between the three convex weldments of the same bolt is ≤ 0.15mm and the shape of the three convex weldments should be the same.

These studs have a broad base that distributes the load and projections that concentrate the weld. The length listed is the overall length.

Choose studs with below-head projection for a stronger hold that uses the full strength of the fastener. Pass these studs through a hole and weld them in place.

Choose studs with above-head projection to weld the screw directly to the surface of the material for a smoother appearance.

Name: Weld Studs

Material: Stainless steel ,Carbon steel 

These studs have a wide base that distributes the load and projections that concentrate the weld. The length listed is the overall length. Choose studs with a below-head forecast for a stronger hold that uses the full strength of the fastener. Pass these studs through a hole and weld them in place. Choose studs with above-head projection to weld the screw directly to the material's surface for a smoother appearance.

Advantages of Carbon Steel Weld Studs

Low-carbon steel weld studs are suitable for use with HRB-80 or less materials. Benefits of carbon steel weld nuts include:

Cost-effective when compared to S.S.

Ideal for high-volume machine parts

Ideal for light and medium applications

Size Can also be According to the Customer's requirement for manufacturing, please check the detailed specification sheet details PDF, CAD, 149-150 Page See more product details.

Automotive Welded Screws (Weld Studs): Structural Fastening Solutions for Modern Vehicle Manufacturing

What Are Automotive Welded Screws?

In automotive manufacturing, welded screws—commonly called weld studs—are threaded fasteners permanently joined to sheet metal components using a controlled stud-welding process.

Unlike conventional screws, which are mechanically driven into pre-tapped holes, weld studs are fused directly to the vehicle body or chassis by an electric arc. The process melts both the stud base and the substrate, forming a metallurgical bond that creates a highly durable threaded anchor point.

This technology enables manufacturers to integrate strong, load-bearing fastening points into thin sheet metal without drilling or tapping.

 Core Functions of Weld Studs in Automotive Applications

1. Permanent Threaded Bases for Structural Assembly

Weld studs provide robust attachment points for bolts, brackets, modules, and structural components across the vehicle platform.

By eliminating the need for drilled and tapped holes in thin panels, they:

• Improve structural integrity

• Increase assembly efficiency

• Reduce part count

• Support high-speed automated production

 Key Automotive Applications

Body Structure (BIW – Body in White)

Large-diameter weld studs (M8–M12) are commonly used in safety-critical areas such as:

• Seatbelt anchorage systems (≥12 kN tensile requirement)

• Anti-collision beams

• Reinforcement plates

• Door hinge brackets

These applications require high tensile performance and reliable weld integrity to ensure occupant safety during impact events.

 Interior and Functional Components

Medium and small-diameter studs (M4–M8) are widely applied to secure:

• Wiring harness brackets

• Carpets and insulation panels

• Door panel components

• Electronic module brackets

Stud welding ensures accurate positioning and helps eliminate rattling or vibration-related noise.

 Chassis and Undercarriage Systems

Weld studs are used to secure:

• Suspension assemblies

• Steering components

• Brake line brackets

• Underbody protection panels

In these applications, strength consistency and fatigue resistance are essential for long-term durability.

 Performance Advantages in Automotive Manufacturing

1. Improved Sealing and NVH Performance

Because stud welding does not require through-holes in sheet metal, it:

• Eliminates potential water and air leakage paths

• Enhances body sealing performance

• Improves NVH (Noise, Vibration, Harshness) control

• Maintains overall body stiffness

This hole-free fastening solution supports higher vehicle refinement standards.

 2. High-Speed Automation & Production Efficiency

Short-cycle arc stud welding is highly compatible with robotic automation.

Typical advantages include:

• Single weld cycle time: 20–100 milliseconds

• Over 30 welds per minute achievable

• Fully programmable welding parameters

• Reduced labor and process complexity

This enables “one-weld-and-use” fastening without secondary operations.

 Supporting Modern Automotive Technology Trends

Electrification (EV Applications)

In electric vehicles, weld studs are used for:

• Battery pack enclosure fastening

• High-voltage electrical grounding points

• Power distribution mounting

Materials must be compatible with lightweight substrates such as aluminum alloys while maintaining reliable electrical conductivity.

 Lightweight Materials & Dissimilar Metal Joining

With the increasing use of aluminum and magnesium alloys, capacitor discharge (CD) stud welding offers:

• Minimal heat input

• Reduced thermal distortion

• Improved joining performance on thin materials

• Effective dissimilar metal joining solutions

This makes weld studs a key enabler in lightweight vehicle design.

 Intelligent Quality Control in Stud Welding

Modern automotive stud welding systems incorporate:

• Precise current and time control

• Lift height monitoring

• Real-time parameter tracking

• Torque verification testing

• Mechanical hammer testing

These quality assurance measures ensure consistent weld strength and production reliability.

 Main Stud Welding Process Used in Automotive Manufacturing

The most common method is short-cycle arc stud welding, which consists of:

1. Arc ignition – The stud lifts and an arc is initiated

2. Melting phase – The arc melts both the stud base and workpiece      surface

3. Pressure bonding – The stud is pressed into the molten pool

4. Rapid solidification – A high-strength metallurgical joint is      formed

This process delivers consistent structural performance for high-volume automotive production.

 Conclusion: The Invisible Structural Backbone of Modern Vehicles

Automotive weld studs serve as the invisible backbone of vehicle manufacturing. They combine:

• Structural strength

• Assembly efficiency

• Lightweight compatibility

• Automation readiness

• Long-term durability

From life-critical seatbelt anchor points to precision wiring harness mounting inside the cabin, every welded stud contributes to vehicle safety, reliability, and comfort.

Why Partner with Juxin fastenersfor Automotive Weld Stud Solutions

With 23 years of manufacturing experience in industrial fasteners, JUXIN provides automotive-grade weld studs engineered for structural reliability and high-volume production environments.

We support OEMs and Tier suppliers with:

• High-strength weld studs (Class 8.8 / 10.9 and customized      grades)

• Carbon steel and stainless steel options

• Short-cycle arc and CD welding compatible designs

• Custom head configurations and special geometries

• Stable welding performance with minimal spatter

• Corrosion protection solutions (Zn plating, Geomet®, Dacromet®,      etc.)

• PPAP documentation support upon request

Our engineering team works closely with customers during the design and validation phase to ensure:

• Welding parameter compatibility

• Substrate material matching

• Structural load compliance

• Long-term durability under vibration and fatigue

With 23 years of industry expertise, we understand that in automotive manufacturing, consistency is not optional — it is critical.

 Technical Consultation for Your Automotive Project

Whether your application involves Body-in-White structures, EV battery enclosures, or chassis assemblies, our team can provide application-specific weld stud solutions tailored to your production line.

Please reach out to our engineering team today to discuss your project requirements.

Packaging: The inner packaging is a plastic bag, and the outer packaging is a carton. Then the tray. Carton size: 29*19*19.5cm and 23.5*17.5*8, cm and pallet size: 215*100*90cm, or as your request