The D-head bolts are non-standard fasteners designed for tight spaces and high-vibration applications. The D-shaped head provides a mechanical flat that locks into place to prevent the bolt from rotating. This feature makes them widely used in automotive and heavy machinery, especially for securing gearboxes, transmissions, and drive shaft assemblies. We also offer D-ring variants for lifting and tie-down anchoring.

As a direct manufacturer, T&Y produces these special-shaped bolts according to your specific technical drawings or samples. We support custom production across a full range of materials (including carbon steel, stainless steel, and brass), metric or imperial thread sizes, and different surface treatments to fit your exact requirements.