Silicone flange caps have an air vent that is commonly used in high-pressure situations to alleviate your components. This simple addition remains highly effective at extremely high temperatures (Up to 600 degrees Farenheit). Because our caps have an over-sized head, you can fit it to long bolts, nuts, screws and other oddly shaped parts. The unique internal grip design of silicone flange caps provide a tight seal around all your awkward parts to ensure the best protection.

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