This classic short reach radiator pressure cap is designed for vehicles with a 20mm inner filler neck depth, making it suitable for many classic cars, motorcycles, and specialist applications where standard reach caps are too long.
Manufactured with a zinc-coated steel case for corrosion resistance and durability, each cap is assembled in England (UK) to a consistent, high-quality standard. The precision spring and seal arrangement ensures reliable pressure control and correct coolant system operation.
Available in a wide range of pressure ratings to suit original manufacturer specifications or bespoke cooling system requirements.
Key Features
Short reach design – fits filler necks with 20mm internal depth
Zinc-coated steel case for long service life
Made and assembled in England (UK)
Classic wing-style cap for period-correct appearance
Suitable for classic cars, motorcycles, tractors, and specialist engines
Multiple pressure options available
Available Pressure Ratings
Select the required pressure from the dropdown:
2.3 lb
4 lb
7 lb
9 lb
10 lb
13 lb
15 lb
Technical Specifications
Specification
Measurement
Cap Type
Short Reach Radiator Pressure Cap
Inner Neck Depth (Fitment)
20mm
Inner Spring Length
20mm
Case Diameter
58mm
Ear-to-Ear Width
78mm
Case Finish
Zinc Coated
Manufacture
Made & Assembled in England (UK)
Fitment Notes
Ensure your radiator filler neck has a 20mm internal depth
Always match the pressure rating to the vehicle manufacturer’s specification
Not suitable for deep-neck or long-reach radiator fillers
If you are unsure about fitment, please measure your existing cap or filler neck before ordering.
What’s Included
1 × Classic short reach radiator pressure cap (selected pressure rating)
