Best Flat Head Carriage Bolts of 2026

The National Hardware Carriage Bolts are designed for versatile use on wood or steel surfaces. Their unique design prevents spinning during installation and tightening, making the process much easier for you. You can tighten these bolts without needing access to both sides of the door, which adds convenience, especially in tight spaces. These bolts are specifically tailored for wood or steel garage doors, ensuring a secure fit and reliable performance for your projects.

The Etomvoop Bolt and Nut Set offers a secure fastening solution with its round head design and square neck, ensuring a self-locking fit in square holes. You can rely on the high-quality 304 stainless steel materials for excellent corrosion resistance, making it perfect for outdoor use. This fully mounting kit includes 30 carriage bolts, nuts, and flat washers, providing ample supply for your projects. With precise dimensions, these bolts are compatible with various applications, making them ideal for wood-to-wood and wood-to-metal fastening.

The Merriway Carriage Bolts are a pack of ten M6 x 100 mm bolts featuring a round head and square neck design. These bolts are ideal for providing a secure fastening solution for various projects, ensuring stability in your assemblies. The inclusion of nuts enhances convenience, allowing for straightforward installation. Additionally, following the provided instructions ensures proper assembly and maintenance, giving you peace of mind in your DIY tasks.

The Merriway Carriage Bolts are a pack of 25 M8 x 75mm zinc plated bolts that feature a round head and square neck. These bolts are perfect for various fixing and assembly projects, providing a secure fit for your needs. The included nuts ensure a complete solution for fastening, giving you everything you need in one pack. Following the included instructions will help you achieve the best results, making your tasks easier and more efficient.

The ForgeFix Carriage Bolts are designed to meet DIN603 and DIN934 standards, ensuring high quality and reliability. Their fully threaded design extends up to 100mm, making them versatile for various applications. These bolts, also known as coach bolts, feature a square section beneath the dome head that prevents rotation when tightened, providing you with a secure fastening. Primarily used for joining timber to timber, these bolts offer convenience and efficiency for your woodworking projects.