NITTO KOHKI SP Cupla Type A 3S-A Steel Quick Coupler Socket with Auto Shut-Off Valve

The body is made of special hardened carbon steel with a surface coating to prevent rust and corrosion. Its standout advantage over standard air couplers is the intelligent two-way shut-off valve system, equipped with built-in spring valve mechanisms in both the socket and the plug. When disconnected, valves on both sides immediately and automatically close to block fluid flow, maintaining system pressure and completely preventing air or fluid spillage in the workspace.

Two-Way Shut-Off Valve: Simultaneously blocks fluid flow and air pressure via dual spring valves on both male and female sides upon disconnection, reducing fluid loss or air pressure drops in the main system.

Premium Hardened Steel Construction: Undergoes a hardening process to enhance external structural strength, resisting impacts, crushing forces, and torsion from dragging thick rubber air hoses.

High Pressure Performance: Supports normal working pressure up to 7.5 MPa (75 bar), which is 5 times higher than conventional air couplers, ensuring safe and worry-free operation in high-pressure applications.

Anti-Leak Sealing: Computer-designed precision valve surfaces paired with special-grade rubber seals provide an airtight seal to lock in pressure and conserve air compressor energy.

Easy and Secure Connection: Standard Japanese Nitto quick-connect mechanism provides smooth coupling and uncoupling while securely locking the plug stem in place without loosening.

Factory Air and Fluid Piping Systems: Ideal as branch connection points in pneumatic air lines, coolant lines, or non-corrosive chemical lubricant lines for steel.

Assembly Lines and Automated Machinery: Used in the automotive and electrical appliance industries at points requiring frequent changes of air supply lines or workstations.

High-End Pneumatic Tools and Equipment: Used to connect air hoses to medium-to-large air tools that require constant and stable air pressure.

Test Benches and Laboratories: Ideal for pneumatic pressure test points or low-pressure water hydraulic systems that require clean disconnections.

Brand: NITTO KOHKI (Made in Japan)

Series: SP Cupla (Type A)

SKU: 3S-A (Steel NBR)

Product Type: Quick Air Coupler / Quick Coupler Female Socket

Coupler Size: 3/8 inch (Series 3 Cross Section)

End Thread Type: Female Thread, Standard Rc 3/8 inch

Body Material: Special Hardened Steel

Seal Material: Nitrile Rubber (NBR)

Valve System: Two-Way Shut-Off Valve

Working Pressure: 7.5 MPa (75 bar / 1,088 PSI)

Max Pressure: 10.0 MPa (100 bar / 1,450 PSI)

Operating Temperature Range: -20 to +80 °C

Hex Size: 28 mm

Overall Length: 53 mm

Product Weight: 0.100 kg (98 g)