Parker 372PTCSP-4-6 Push-to-connect Plug 1/4 X 3/8 in

Product Description

The PARKER 372PTCSP-4-6 is a push-to-connect plug tube fitting designed to seal off an open tube end without tools. Constructed from brass with Buna-N and nylon components, this plug accepts tubing with a 1/4 inch and 3/8 inch outside diameter and holds a maximum working pressure of 250 psi. It is used in pneumatic and fluid control plumbing lines where a quick, reliable tube termination is needed. Licensed plumbers, HVAC technicians, and industrial maintenance pros install this type of fitting when capping off unused ports or isolating a branch in a pressurized line.

This fitting is suited for residential and light commercial pneumatic systems, compressed air lines, water supply tubing, and general fluid handling applications. The push-to-connect design allows a tube to be inserted and locked without wrenches or thread sealant. It is commonly used in HVAC equipment, refrigeration line sets, and plumbing manifolds where quick service access and pressure integrity are both required.

Key Features

• Push-to-connect design — no tools required for tube insertion
• Rated to 250 psi maximum working pressure
• Brass body with Buna-N seal and nylon components for corrosion resistance and flexibility
• Accepts 1/4 inch and 3/8 inch OD tubing
• Compact form factor: 1.42 inches long, 0.75 inches wide, 1.2 inches tall
• Single-piece package — sold individually

Compatibility

Designed as an OEM-style push-to-connect plug fitting for pneumatic and fluid control tubing systems using 1/4 inch and 3/8 inch outside diameter tubing up to 250 psi working pressure.

Installation Notes

Depressurize and isolate the tubing line completely before installing or removing this fitting. Ensure the tube end is cut square and free of burrs before insertion to achieve a proper seal. This fitting is typically installed by licensed plumbers, HVAC technicians, or qualified maintenance personnel working on pneumatic or fluid systems. Verify that the tube material and media are compatible with brass and Buna-N before use.