Ring Weld Projection Stud

Name:Type UR Projection Weld Studs

Material: Carbon Steel, Stainless Steel

Carbon steel Grade:5.8, 6.8, 8.8, 10.9

1. The working principle of projection welding:

Projection welding is an evolution of spot welding. Generally speaking, a mountain point is punched out on one of the two plates, and then welded. Due to the concentration of current, it overcomes the defect of nugget offset during spot welding. One or more nuggets form at the joint.

2. Features of the projection welding process:

During projection welding, the electrode must drop rapidly as the bump is sub-collapsed, otherwise spatter will occur due to pressure loss, so a projection welding machine with good electrode followability should be used.

The electrode pressure should ensure that the bumps are completely sub-collapsed when they reach the welding temperature so that the workpieces can fit closely. If the pressure is too high, the bumps will be crushed prematurely, and the function of projection welding will be lost.

The reduced flow density will reduce the strength of the joint, and the pressure will be too small to cause sub-heavy splashing.

Usually, the welding time of projection welding is longer than that of spot welding, and the flow is smaller than that of spot welding. Multi-point projection welding is a slightly longer welding time than single-point projection welding to reduce the difference in heating at each point caused by inconsistent bump heights.

The current required for each spot of projection welding is smaller than that of spot welding the same spot, but the current must be able to melt the bump before the bump is completely crushed. The welding current is approximately the current required for each bump multiplied by the number of bumps.Various specifications can be manufactured according to customer requirements.

Typical Properties of the Projection and Spot Weld Screw

Material: C1010 High-Welding Quality, Low Carbon Steel (plain finish unless otherwise specified)

C1022 Heat-Treated, Carbon Steel (plain finish unless otherwise specified)

Austenitic Stainless Steel (passivated finish)

Threads Inch (low carbon): Unified Standard Class, 2A ASME B 1.1-2003

Inch (stainless steel): ASME B 1.13-2005

Metric: ASME B 1.13-2005

Available thread sizes

Inch Metric

#6-32 M3.5 x 0.6

#8-32 M4 x 0.7

#10-32 M5 x 0.8

1/4-20 M6 x 1.0

5/16-18 M8 x 1.25

3/8-16 M10 x 1.5

Note: A variety of dimensional characteristics also available (lengths, heights, diameters, etc)

Application notes

When properly installed, this projection weld screw will provide a strong hermetic seal to protect against leakage of water, oil, air, or gas. This makes this industrial fastener a popular choice within the refrigeration and air conditioning industries. The 360° ring projection provides an exceptionally strong circular weld joint and is ideal for cross-wire welding. It can also be welded to perforated metal surfaces.

For applications that require a weld screw that can also function as a strong hermetic seal, this projection weld screw is an ideal choice. The circular weld joint that it provides ensures that the resulting weld will be strong, well-balanced, and durable.

Juxin Fasteners has 20 years of experience in the industrial fastener business. We carry a full suite of industrial fastener products and pride ourselves on our ability to stay abreast of all industry trends and developments.

We offer our customers:

Competitive pricing

Fast and reliable delivery performance

Expert consultation

Friendly customer service

Size Can also be According to the Customer's requirement for manufacturing, please check the detailed specification sheet details PDF, CAD, 213-214 Page See more product details.

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*8cm and pallet size: 215*100*90cm, or as your request.

Packaging Standard

At Juxin Fasteners, we apply standardized export packaging to ensure product protection, traceability, and compliance with international logistics requirements.

1. Standard Export Packaging

Unless otherwise specified, all products will be packed according to our factory standard export packaging, which includes:

Moisture-resistant inner protection

Poly bag or small box packing as required

Reinforced export cartons

Clear labeling with part number, specification, batch number, and quantity

Palletizing for sea or air shipment when necessary

Our standard packaging is designed to ensure safe transportation, efficient warehousing, and long-distance international shipping.

2. Customized Packaging Options

We also provide customized packaging solutions according to customer requirements, including but not limited to:

Private labeling

Customized barcodes

Specific carton dimensions

Retail packaging

Special pallet configuration

Customer-specific marking and identification

So that you know, customized packaging may involve additional costs and extended lead time depending on the complexity of the requirements.

3. Compliance & Quality Assurance

All packaging processes are controlled under our ISO 9001 quality management system to ensure consistency, traceability, and product integrity throughout the supply chain.