Pressure Plug - Brass, Inch

This pressure plug is used in injection mold cooling and plumbing circuits to seal sealed pipe ends or to close off specific runs without disturbing the rest of the manifold layout.

In typical mold interior cooling scenarios, the flush taper geometry helps achieve a stable contact surface at the pipe end, reducing the risk of leakage during pump pressure and thermal cycling.

• Inch piping assemblies for tool cooling: Ideal for sealing openings where inch nominal line sizing is used; the flush taper plug design supports consistent fit.
• Afterline modifications: Useful when a section of cooling plumbing must be isolated during maintenance or reconfiguration; the plug provides a direct end-closure solution.
• Corrosion-exposed water circuits: Brass construction is suited for many common plumbing/tooling environments where corrosion resistance is required.

This product is made from brass, selected for good corrosion resistance in typical water-based cooling and plumbing environments used around molds.

Brass does not require the same high-hardness heat treatment strategy as tool steels; instead, its performance is primarily driven by the alloy’s inherent corrosion behavior and manufacturability. The plug is manufactured to a flush taper configuration to ensure sealing contact at the pipe end.

• Heat treatment: No specific quench-and-temper or nitriding is indicated for this brass variant.
• Hardness / wear trade-off: Compared with hardened tool steels, brass generally provides lower wear resistance; however, it is well suited for sealing service where the plug primarily experiences fluid pressure and limited abrasive wear.
• Material comparison: If hardness and abrasion resistance are critical, engineers often consider tool-steel alternatives for higher-wear interfaces, but brass is preferred here for corrosion-friendly sealing in inch piping setups.

Selection is based on matching the plug to the nominal pipe size (in) of the circuit you are sealing. This variant is specified for 1 ~ 3 in nominal pipe sizes.

To size correctly, identify the nominal pipe size of the sealed pipe end where the plug will be installed, then choose the corresponding size within the 1/16"–3/8" sizes availability noted for this inch flush taper plug design. Ensure the plug’s taper engages the end opening to provide the flush sealing interface intended for this design.

• Match to mold cavity/core requirements: Use the plug wherever a cooling or plumbing run must be isolated while keeping the rest of the circuit operational.
• Tolerance/fit considerations: Because sealing performance depends on taper engagement, confirm that the installed interface and pipe end geometry correspond to the inch sizing standard used in your tooling drawings.
• Configurable vs fixed: The geometry is fixed as a flush taper plug design; sizing is selected from the stated inch size range.