3502-104A – Flange Yokes – 1350 Series – Bolt Circle Dia 3.470″ – Pilot Dia 4.093, OD

Flange Yoke 3502-104A -- 1350 Series, 3.470" Bolt Circle

Sourced directly from the drivetrain component specialists at Universal Driveshafts, the 3502-104A is a 1350 series flange yoke machined to consistent, measurable tolerances. It is purpose-built for applications where the driveshaft must bolt directly to a companion differential or transfer case flange rather than slip over a spline. The 4.093" pilot feature ensures immediate concentricity the moment the yoke is seated.

Technical Data

How the Bolt Circle Drives Compatibility

The 3.470" bolt circle is the defining compatibility dimension -- it must match the companion flange exactly. Attempting to use a yoke with a different bolt circle leads to misaligned holes, requiring elongation that destroys the precision fit. The 3502-104A is stocked specifically for flanges with a 3.470" PCD, so there is no guesswork at the bench. It ships with 8 bolt holes of 0.425" diameter, ready for standard or metric hardware depending on your vehicle platform.

Pre-Installation Checklist

• Measure companion flange bolt circle -- must equal 3.470"
• Confirm pilot diameter of mating flange matches 4.093" pilot
• Check that your u-joint series is 1350 -- cap size compatibility is non-negotiable
• Verify CJ-to-flat (3.440") against cap depth in your u-joint to prevent interference
• Clean and de-burr both mating faces before final assembly

Build Quality

Every 3502-104A is forged from carbon steel for grain-flow strength, then machined to finished dimensions. The ear bores are sized for 1350 series cap diameter -- no reaming required. Whether this is a stock replacement or part of a custom high-performance build, the part will handle the torque loads the 1350 series was rated for without deflection or fretting at the bolt faces.