Fitting Male Roll Pin End to 4AN

The McLEOD Fitting Male Roll Pin End to 4AN (Part #139026) is a precision hydraulic adapter designed to connect a master cylinder outlet to a 4 AN male port. This straight-through fitting uses a roll-pin retention mechanism and is constructed from cadmium-plated steel, providing corrosion resistance in demanding brake system applications where reliability under high pressure is non-negotiable.

The roll-pin end configuration locks onto the master cylinder outlet without threading, enabling quick installation and removal while maintaining a secure, leak-free connection. The cadmium plating protects against rust and oxidation in environments where moisture exposure is constant—particularly important in vehicles subjected to wet conditions, salt air, or frequent washing. The 4 AN male adapter end accepts standard hose barbs and fittings, ensuring compatibility with modern brake line systems across a wide range of motorsports and street applications.

This adapter serves builders and technicians working on custom brake systems, street rods, performance vehicles, and racing applications where non-threaded master cylinder connections are present. The fixed straight design eliminates elbows and reduces fittings in the brake line routing, lowering points of potential failure and simplifying line layout. Whether fabricating a complete brake system or troubleshooting an existing one, this McLEOD fitting delivers the precision connection automotive systems demand.

McLEOD is recognized in the automotive performance community for engineering high-pressure hydraulic components that withstand the rigors of competition and extreme driving. This roll-pin adapter reflects that commitment to pressure integrity and corrosion resistance, making it a trusted choice for professional rebuilds and serious enthusiast projects.