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

DogBone Reinforced Silicone Caps (5/16")

While they may resemble traditional vacuum caps, DogBone Reinforced Silicone Caps are specifically engineered for pressurized cooling systems, where standard vacuum caps would fail.

Manufactured using the same high-quality process as reinforced silicone radiator hoses, each cap features three layers of polyester webbing for maximum strength and durability. Designed to withstand extreme temperatures and pressures, these caps provide long-term reliability in demanding environments.

Perfect for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and more.
(Not compatible with fuel, oil, or petroleum-based products.)

Technical Specifications:

• Product Type: Reinforced Silicone Coolant Cap
• Temperature Range: -65°F to +350°F (-53°C to +177°C)
• Reinforced Layer: 3-ply Polyester
• Inside Diameter: 5/16" (8mm)
• Color: Black exterior, Red interior
• UV and ozone resistant