Product Description

This large commercial radiator pressure cap is designed for heavy-duty cooling systems found on cars, commercial vehicles, plant machinery, and agricultural equipment. Manufactured with a zinc-coated steel case for corrosion resistance and durability, this cap provides reliable pressure regulation and a secure seal under demanding operating conditions.

With an overall diameter of 70mm, this cap is engineered to fit radiator filler necks measuring 68mm in diameter with an inner depth of 19.5mm. It is ideal for both replacement and restoration applications where correct fitment and pressure control are critical to cooling system performance.

Available in a range of pressure ratings to suit different engines and operating requirements.

Key Features

• Large commercial-grade radiator pressure cap
• Zinc-coated steel case for corrosion resistance
• Strong internal spring and sealing components
• Designed for heavy-duty automotive and industrial use
• Suitable for car, commercial, plant, and agricultural applications
• Multiple pressure options available

Available Pressure Ratings

• 4 lb
• 7 lb
• 10 lb
• 15 lb
• 20 lb

(Select the required pressure rating from the dropdown menu.)

Technical Specifications

Fitment Notes

• Ensure your radiator filler neck measures 68mm diameter with 19.5mm internal depth before ordering
• Pressure rating should match manufacturer specifications for your cooling system
• Professional installation recommended if unsure

What’s Included

• 1 × Large Commercial Radiator Pressure Cap (selected pressure rating)