Smc Pneumatics KQ2E09-00A Bulkhead Union Fitting 5/16 in Od

Product Description

The SMC PNEUMATICS KQ2E09-00A is a push-to-connect bulkhead union tube fitting designed for pneumatic plumbing through panel walls and bulkheads. It accepts 5/16-inch OD tubing and threads into a 3/4-16 UNF port, creating a secure, leak-resistant passage without the need for additional sealants on the tube connection. The fitting body is brass with polybutylene internal components, rated to a maximum working pressure of 145 psi. Licensed plumbers, pipefitters, and pneumatic system technicians install this type of fitting in compressed-air distribution, fluid transfer, and instrument-air systems where a clean panel penetration is required.

The KQ2E09-00A is suited for light industrial and commercial pneumatic applications operating within a temperature range of 23 degrees F to 140 degrees F. Typical installation scenarios include panel-mount compressed-air lines, automation enclosures, and modular pneumatic assemblies where tubing must pass cleanly through a partition. The push-to-connect design allows fast tube insertion and positive retention without additional fittings or ferrules. This fitting ships individually and is compatible with standard 5/16-inch OD polybutylene or compatible flexible tubing used in pneumatic circuits.

Key Features

• Push-to-connect design for tool-free tube insertion and secure retention
• 145 psi maximum working pressure for pneumatic and low-pressure fluid service
• 3/4-16 UNF thread for direct panel or bulkhead mounting
• Brass body with polybutylene components for corrosion resistance in pneumatic service
• RoHS-compliant construction
• Operating temperature range from 23 degrees F to 140 degrees F

Compatibility

Designed for use with 5/16-inch OD flexible tubing in pneumatic and low-pressure fluid systems requiring a bulkhead union configuration with a 3/4-16 UNF thread interface.

Installation Notes

Depressurize and lock out the pneumatic system completely before removing or installing any fittings. Thread the fitting body into the panel cutout by hand first, then tighten the locknut to secure the bulkhead mount without overtightening the brass threads. Insert tubing fully into the push-to-connect collet until it seats, then give a slight pull-back to confirm retention. Verify the system holds pressure at operating conditions and inspect for leaks before returning to service.