Best Automotive Engine Knurled Head Bolts of 2025

The Ganter Knurled Screws offer a convenient solution for your automotive needs. With a diameter of 12 mm and a thread size of M3 x 8, these screws are designed for easy handling and installation. They are made from galvanised steel, providing durability and resistance to corrosion, which is essential for maintaining the longevity of your components. With a strength class of 5, you can trust these screws to hold securely under pressure. Additionally, the freely rotating viewing area allows for easier adjustments, making your work more efficient.

The GM Head Bolt 19258707 is a genuine product from General Motors, designed specifically for automotive engines. Weighing just 0.1 pounds, this head bolt is lightweight yet robust, making it easy to handle during installation. With a package quantity of one, you can conveniently purchase just what you need for your project. As a high-quality automotive component, this product ensures a secure fit, enhancing the reliability of your engine. Choosing this head bolt helps you maintain optimal performance in your vehicle.

The Mercury Button Throttle Part is a versatile replacement for the original part # 822212. It is designed to supersede part # 822212, ensuring you have the latest design for optimal performance. Sold individually, it allows you to purchase exactly what you need without unnecessary extras. Importantly, you should verify your own fitment to ensure compatibility, giving you peace of mind that it will work seamlessly with your engine setup.

The ARP Cylinder Head Bolts are designed specifically for Small Block Chevy engines, ensuring a precise fit for your vehicle. Weighing in at 5.0 pounds, this kit provides the necessary strength and durability for high-performance applications. With the part number 134-3601, you can easily identify this reliable product. The knurled head bolts offer an improved grip, making it easier for you to secure your engine components effectively, thus enhancing overall engine performance.

The PrecisionGeek Knurled Screws are custom-made aluminium screws designed for automotive applications. With a total length of 20mm and a head diameter of 10mm, these screws provide a robust solution for your engine needs. Being strong and made in the EU, they ensure durability and reliability. Their knurled head design allows for easy gripping, making installation and removal straightforward for you. This set of four screws offers convenience and efficiency, making them an essential addition to your toolkit.

The ROMASO Jeep Screws Bolts are expertly designed for your Jeep Wrangler JK, fitting various components like light brackets, the windshield frame, and hard top. These M8 screws ensure a secure fit, providing durability and peace of mind. With their high-strength metal and rust-resistant coating, you can trust that your vehicle parts will remain intact and attractive. The specific dimensions make installation straightforward, ensuring that you can quickly enhance your Jeep’s structure with these reliable screws.

The PrecisionGeek Aluminium Thumb Screws are designed for convenience and efficiency. With a thread size of M4 x 10mm, they provide a secure fit, making them ideal for automotive applications. The knurled head, with a diameter of 10mm and a thickness of 4mm, ensures easy gripping, allowing you to tighten or loosen them without hassle. Additionally, the total length of 14mm adds versatility for various uses. Made from high-quality aluminium in the EU, these screws are both lightweight and durable, giving you peace of mind during installation.

The ARP 5/16-18 Bolts are designed for strength and durability. With a diameter of 5/16" and a thread pitch of 18, these bolts provide a reliable fit for various automotive applications. Their impressive rating of 170,000 PSI means they are considerably stronger than standard Grade 8 hardware, ensuring they can handle heavy loads. Made from polished Stainless 300 steel, these bolts resist rust and corrosion, making them ideal for long-term use in harsh environments. The compact 12-point head design offers better gripping power, making installation easier for you.

The VW Countersunk Socket Bolt is a genuine part designed specifically for Volkswagen vehicles. Its high-quality construction ensures reliability and durability, providing you with peace of mind during installation. The knurled head feature offers improved grip, making it easier for you to tighten and loosen the bolt when necessary. As a genuine Volkswagen product, it guarantees compatibility with your vehicle, ensuring optimal performance and fit. Investing in this socket bolt means you are choosing a reliable component that will serve your automotive needs effectively.

The Quicksilver Seal 26-8M0058391 is designed for use with the gear case 3/8-16 drain/fill found on most Mercury MerCruiser and Mercury Outboards, except those of Japanese origin. By following your owner's or service manual, you can easily determine its specific applications and installation instructions, ensuring a correct fit. This part is produced by Mercury Marine, meeting high original equipment manufacturer specifications, which helps maximise the performance of your outboard or stern drive. With this seal, you can enjoy enhanced reliability and functionality in your marine engine.