SMC KQ2S04-M3G Hexagon Socket Head Male Connector
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SMC KQ2S04-M3G Hexagon Socket Head Male Connector
1. Product Overview
The SMC KQ2S04-M3G is a compact straight one-touch pneumatic connector from the KQ2 series, designed for seamless, tool-free connection between 4 mm outer diameter (OD) pneumatic tubing and M3 male threaded ports. Featuring a hexagon socket head for secure installation in confined spaces, this connector is optimized for small-scale automation systems, laboratory equipment, and precision instrumentation where minimal space and reliable airtight connections are critical. Its lightweight construction and corrosion-resistant materials ensure stable performance across vacuum and positive pressure applications, with compatibility for multiple tubing types to meet diverse industrial and experimental needs.
2. Main Functions
| Function | Detailed Description |
|---|---|
| Tool-Free 4 mm Tube Connection | Push-in design enables instant insertion and locking of 4 mm OD tubing; the internal collet mechanism provides firm clamping force without requiring tools, reducing assembly time and labor costs. |
| Space-Saving Hexagon Socket Installation | The hexagon socket head allows for secure fastening with an Allen key, making it ideal for installation in tight spaces where standard wrench access is limited. |
| Leak-Free Threaded Interface | M3 male thread ensures precise connection to small-diameter ports on valves, sensors, or miniature actuators, delivering airtight performance for low-flow pneumatic circuits. |
| Quick Tubing Disconnection | A simple push on the release collar disengages the collet, allowing fast tubing removal for system maintenance, reconfiguration, or component replacement without damage. |
| Vacuum & Positive Pressure Compatibility | Supports operation across a wide pressure range, from full vacuum (-100 kPa) to positive pressure (1.0 MPa), suitable for both suction-based pick-and-place and small-actuator control applications. |
3. Technical Features
- Miniature Compact Design: Ultra-small profile with minimal axial and radial dimensions, making it suitable for integration into dense automation setups and precision equipment with limited installation space.
- Corrosion-Resistant Materials: Brass body with electroless nickel plating resists rust and chemical contaminants; stainless steel (SUS304) collet and chuck components enhance wear resistance and durability.
- Multi-Tubing Compatibility: Works with 4 mm OD tubing made of polyurethane (PU), nylon, and polyethylene (PE), providing flexibility for different application requirements (e.g., flexibility, chemical resistance).
- Integrated Sealing System: Built-in nitrile rubber (NBR) seals ensure leak-free performance, eliminating the need for additional gaskets or sealants and simplifying installation.
- Wide Operating Conditions: Functions reliably at temperatures ranging from -5°C to 60°C, adapting to typical industrial and laboratory environments with non-condensing humidity.
- High Safety Rating: Boasts a 3.0 MPa proof pressure (at 23°C), ensuring structural integrity and preventing failure during pressure testing or unexpected pressure spikes.
- RoHS Compliance: Meets international environmental standards, free of restricted hazardous substances, suitable for eco-friendly manufacturing and research facilities.
4. Product Dimensions (Unit: mm)
| Dimension Parameter | Value |
|---|---|
| Tube Outer Diameter Compatibility | 4 |
| Thread Specification | M3 Male |
| Thread Length | 5 |
| Hexagon Socket Size | 2.5 (Allen Key Compatible) |
| Overall Length (Thread End to Tube End) | 22 |
| Maximum Body Diameter | 10 |
| Release Collar Diameter | 12 |
| Minimum Mounting Clearance (Allen Key Access) | 15 |
5. Weight and Material Specifications
| Component | Material | Weight (g) |
|---|---|---|
| Main Body | Brass (Electroless Nickel Plated) | 6 |
| Collet & Chuck | SUS304 Stainless Steel | 1 |
| Release Collar | Reinforced Engineering Plastic | 1 |
| Seal Ring | Nitrile Rubber (NBR) | 0.5 |
| Hexagon Socket Insert | Brass | 0.5 |
| Total Weight (Assembly) | – | 9 |
6. Key Performance Parameters
| Parameter | Value |
|---|---|
| Operating Pressure Range | -100 kPa to 1.0 MPa |
| Proof Pressure (23°C) | 3.0 MPa |
| Operating Temperature Range | -5°C to 60°C |
| Fluid Compatibility | Filtered Compressed Air, Non-Freezing Water |
| Connection Torque (M3 Thread) | 1.5–2.0 N·m |
| Service Life | ≥50,000 Insertion/Removal Cycles |
| Leakage Rate | ≤0.5 cm³/min (at 0.6 MPa) |
| Tubing Material Compatibility | PU, Nylon, PE (4 mm OD) |
| Environmental Compliance | RoHS Compliant |
WHO WE ARE
About us
Located in Kunshan, China, Atifts Technology Co., Ltd. is a well-known enterprise specializing in electronic components distribution. We specialize in the sales of global brands of industrial automation components, with a wealth of experience in foreign product agents, and many of the world's leading manufacturers such as Keens, Schneider, SMC, ABB, Siemens, and other world-renowned manufacturers to establish a long-term and stable relations of cooperation.
Atifts Technology Co., Ltd. @ 2024
Over the years, we have always adhered to the "pioneering, pragmatic, standardized, innovative" management philosophy, and constantly promote the close integration of products and market demand. We firmly believe that only by constantly exploring new market areas, doing a good job in every detail, standardizing business processes, and continuously innovating products and services can we ensure that our products are more adaptable to market changes and meet the diversified needs of our customers.
Since the founding of the company, we have always adhered to the core concept of "survival by quality", and are committed to providing customers with high-quality electronic components. At the same time, we take specialized R & D manufacturing as the goal, market-oriented development strategy to ensure that our products are always in the forefront of the industry.
With excellent product quality, professional technical service and good market reputation, Kunshan Autofits Technology Co.,Ltd. has won the trust and support of our customers. We look forward to working with more partners hand in hand, to achieve long-term win-win relationship, and jointly promote the prosperity of the electronic components industry.
Where is your company located?
We are located next to Shanghai, the largest city in China, and Kunshan, the first economic county in China. With convenient transportation and developed logistics, it provides a good geographical advantage for our electronic components sales business.
What types of electronic components does your company mainly sell?
We are committed to providing many types and brands of electronic components, including but not limited to Sensors, Switches & Relays, Connectors, Circuit Protectio, Power Supplier & Cable, etc. We have established relationships with many well-known electronic component manufacturers. We have established long-term and stable relationships with many well-known electronic component manufacturers to ensure that the products we sell are of reliable quality and reasonable price.
What are the prices of your products?
Our product prices vary according to market conditions and product models. We are committed to providing high quality electronic components at fair and reasonable prices, and offer our customers a variety of incentives and flexible purchasing methods.
How to purchase your electronic components?
You can contact our customer service staff directly by phone, whatsapp, email, our official website. We support a variety of payment methods, and provide you with fast and safe logistics and distribution services.
How do you guarantee the quality of your products?
We attach great importance to product quality, all the electronic components we sell come from regular channels and undergo strict quality testing. We promise to provide customers with high-quality electronic components, and provide perfect after-sales service to ensure that customers have no worries in the process of use.
If I am not satisfied with the electronic components I purchased, can I return them?
We provide perfect after-sales service, if you are not satisfied with the purchased electronic components, you can return or exchange them within the specified time. Please refer to our official website or consult our customer service staff for the specific return policy and process.
Can your company provide technical support and solutions?
We have a professional technical team that can provide technical support and solutions for our customers. Whether you encounter any problems in choosing or using the products, we will be happy to answer your questions and provide professional technical support.
How to contact your customer service?
You can contact our customer service personnel through the online customer service system on our official website, telephone, e-mail or social media platforms. Our customer service staff will provide you with professional services and answer any questions you may have.
Does your company often organize promotional activities?
In order to give back to our customers, we will organize various promotions from time to time, including discounts, full reductions, giveaways and so on. Please keep an eye on our official website or social media platforms to stay up-to-date with the latest promotions.
