1/4in-20 x 2 1/4in SHCS

The 1/4in-20 x 2 1/4in SHCS (Socket Head Cap Screw) from BRINN TRANSMISSION is a critical fastener designed for precision automotive assembly and engine modification work. This Grade 5 steel fastener serves as a go-to component for builders and mechanics working on transmission builds, engine dress-up kits, and custom drivetrain installations where reliability and corrosion resistance are non-negotiable. Whether you're securing bellhousing components, transmission adapters, or performance headers, this bolt delivers the holding power required in high-vibration environments.

Manufactured from Grade 5 steel with black oxide coating, this fastener combines superior tensile strength with corrosion protection essential for underhood applications. The 1/4-20 thread specification provides fine-pitch engagement ideal for thin-wall transmission housings and aluminum adapters, while the 2 1/4 inch length accommodates most standard transmission and engine accessory mounting patterns. The allen head (hex socket) design prevents bolt slip during installation and removal, and the black oxide finish resists rust in moisture-prone engine bay environments while maintaining a professional appearance on visible fasteners.

Mechanics and drivetrain builders rely on BRINN fasteners for OEM-quality hardware that won't compromise build integrity or require frequent replacement. These bolts work seamlessly in transmission bell housing assemblies, engine-to-frame mounts, and custom bracket installations where vibration and thermal cycling demand consistent clamping force. A single fastener is included; buyers undertaking full transmission builds or engine swaps typically order multiple units to ensure adequate stock for all mounting points and future rebuilds.