The 5/16" Self-Tapping Boiler Repair "PK" Plugs from Braxton Harris are essential for quick and effective boiler repairs. These plugs are designed to create a secure seal in various boiler applications, preventing leaks and ensuring optimal performance. Made from high-quality materials, they offer excellent durability and resistance to corrosion. The self-tapping feature allows for easy installation without the need for pre-drilling, making repairs faster and more efficient. Suitable for both residential and commercial boilers, these plugs are a reliable solution for maintaining boiler integrity.