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KQ2H04 4mm One Touch Pneumatic Air Connector
The KQ2H04 series is a premium one-touch pneumatic connector designed for instant, leak-free piping. Featuring a high-precision stainless steel grabbing claw and a low-force oval release button, it ensures secure 4mm tubing connections. Perfectly interchangeable with SMC standards, it is the ideal choice for compact industrial automation systems.
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Product Detailed Description：
As a Source Factory, we offer the KQ2H04 series as a cost-effective, high-performance alternative to brand-name pneumatic fittings. These male straight connectors are engineered for reliability across millions of cycles. The internal structure features a high-grade NBR seal that maintains integrity from vacuum up to 1.0 MPa.
Our KQ2H04 series is manufactured to strict industrial tolerances, ensuring 100% compatibility with SMC KQ2 series. Whether you are an OEM machinery builder or a maintenance professional, our fittings provide the "fit and forget" reliability required for modern high-speed production lines. By purchasing directly from the factory, you benefit from bulk discounts, consistent quality control, and rapid delivery.
Product Feature:
1. Instant One-Touch Connection: Enables immediate, tool-free tube insertion and disconnection, significantly speeding up assembly and maintenance workflows.
2. Ergonomic Oval Release Button: The unique oval shape requires less manual force to release the tube, preventing finger fatigue and ensuring easier operation in tight spaces.
3. Secure Stainless Steel Claw: Features a high-precision grabbing claw that grips the tube firmly, providing a secure, vibration-resistant connection even under high-pressure conditions.
4. Electroless Nickel Plating: All brass components are nickel-plated for superior corrosion resistance and a professional aesthetic, suitable for various industrial environments.
5. Compact & Lightweight Design: Perfect for high-density piping and miniature automation systems where space optimization and weight reduction are critical.
6. Versatile Tubing Compatibility: Fully optimized for use with Polyurethane (PU), Nylon, and Soft Nylon tubing, offering 100% interchangeability with SMC KQ2 series.
Specification：
| Series | KQ2 Series |
| Bore Size | Ø2, 3.2, 4, 6, 8, 10, 12, 16 mm |
| Fluid Type | Compressed Air / Water |
| Body Material | Brass |
| Seal Method | Sealant (R threads) / Gasket (M threads) |
| Ambient & Fluid Temp. | -5°C to 60°C (Water: 0°C to 40°C) |
| Proof Pressure | 3.0 MPa |
| Operating Pressure | -100 kPa to 1.0 MPa (145 psi) |
1. Industrial Automation and Assembly：
In high-speed assembly lines, 4mm air lines power essential sensors and miniature cylinders. The KQ2H04 provides the reliable, high-density connections needed for manifold arrays. Its quick-connect design allows technicians to perform rapid maintenance or reconfigure lines with zero downtime, ensuring consistent pneumatic logic in packaging and manufacturing plants.
2. Robotics and End-of-Arm Tooling：
Precision robotics require lightweight, secure air connections that can withstand constant motion. The KQ2H04's compact hex body and secure stainless steel claw make it ideal for robotic wrists and grippers. It maintains a perfect seal during rapid multi-axis movements, ensuring pneumatic suction cups and actuators operate with maximum precision and force.
3. Medical and Lab Automation：
Cleanliness and leak-free performance are vital in diagnostic equipment. The nickel-plated KQ2H04 offers excellent chemical resistance for laboratory environments. Its reliable pressure handling ensures that sensitive liquid handling systems and automated testing devices receive stable, regulated air pressure, which is critical for maintaining the accuracy of delicate medical measurements.
Installation and Usage：
1. Tube Preparation: Cut the 4mm tube at a clean, 90-degree angle using a professional tube cutter. A jagged or angled cut is the leading cause of air leaks.
2. Firm Insertion: Push the tube through the release button and internal seal until it reaches the bottom of the fitting. You will feel a distinct "stop" once seated.
3. Lock Verification: Gently pull the tube outward after insertion. The internal stainless steel claws should grip the tube firmly, preventing any movement or sliding.
4. Tool-Free Release: To remove the tube, press the oval release button down firmly and evenly with two fingers, then pull the tube out smoothly from the connector.
5. Thread Sealing: For R-threaded models, simply screw into the port. The pre-applied sealant ensures a leak-proof fit. For M-threads, ensure the gasket is centered before tightening.
FAQ
Q1. Is this product 100% compatible with SMC KQ2H04 fittings?
A1. Yes, our dimensions and performance ratings match the SMC KQ2 series perfectly, allowing for direct replacement in any existing pneumatic circuit.
Q2.Can I use these fittings for water lines?
A2. Yes, they are compatible with both air and water. Please ensure the water temperature does not exceed 40°C to maintain the integrity of the internal seals.
Q3.Can I get free samples to test before a bulk purchase?
A3. Absolutely. We offer samples for quality testing.
Q4. Do you support OEM/ODM services for custom branding?
A4. Yes! We can laser-print your logo on the hex body, customize the release button color, and provide branded retail packaging to help you build your own brand.
Q5. Are you a trading company or the actual source factory?
A5.We are a specialized source factory for pneumatic components. We own the full production line, ensuring you get the best price-to-quality ratio and direct technical support.
Q6.Do these fittings require Teflon tape for the threads?
A6. No, our R-threads come with pre-applied sealant. Simply install them directly. For M3/M5/M6 threads, a sealing gasket is integrated into the design.
Q7. What is the delivery time ?
A7.Normal model 1-3days,because we have ability to do the stock.For big order,it takes about 10-15days.
Q8. What is the payment term?
A8.We accept T/T, L/C, WESTERN UNION.
