DogBone High Temperature Reinforced Silicone Coolant Cap - 5/16" ID (6.5mm) w/ Hose Clamp

We are proud to introduce the DogBone Reinforced Silicone Caps for air and coolant. While they look a lot like traditional vacuum caps, the DogBone Reinforced Silicone Caps are designed specifically to be installed on your cooling system. Vacuum caps have no reinforcement and are intended for vacuum and very little pressure.

The DogBone Reinforced Silicone Caps are manufactured just like reinforced silicone radiator hoses. With 3 layers of polyester webbing for reinforcement, you can be sure that DogBone Reinforced Silicone Caps will withstand the high temperatures and pressures of your cooling system for years to come.

DogBone Reinforced Silicone Caps are compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more. DogBone reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.

Technical Specification

Product Type: Reinforced Silicone Coolant Cap
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 3-ply Polyester
Inside Diameter:5/16" (8mm)
Color: Black Outside, Red Inside
UV and ozone resistant