1202-181 – Flange Yokes – 1251 Series – Pilot Dia 1.811″ – Bolt Circle Dia 3.200

Understanding the 1202-181 Flange Yoke -- 1251 Series Application

Not every driveshaft terminates at a slip yoke. Many factory and performance builds use a bolted companion flange at one or both ends, and the 1202-181 is the correct 1251 series yoke for those configurations. It presents a 4-bolt pattern on a 3.200" bolt circle with 0.400" bolt holes and a 1.811" pilot, covering the dimensional requirements for a broad range of OEM and custom companion flanges.

Specification Summary

Series Ratings and Torque Capacity

Series 1251 represents a specific u-joint cross size and load rating. Running a mismatched series component downstream of a 1251 u-joint creates an unbalanced failure point -- the weakest link defines when and where the drivetrain breaks. The 1202-181 is designed as a native 1251 series component, so the cap bores match the cross dimensions and the torque path remains consistent from u-joint to flange face.

Assembly Guidance

• Seat the 1.811" pilot fully before torquing -- do not rely on bolts to draw the yoke into alignment
• Distribute bolt load evenly through at least three torque passes
• Apply thread-locking compound on fasteners exposed to vibration (off-road, high-RPM)
• After initial drive, re-check bolt torque -- new joints settle slightly during first use
• CJ-to-flat dimension of 1.625" must clear u-joint lock ring or snap ring groove

Ordering Confidence

If you have confirmed that your companion flange has a 3.200" bolt circle, 0.400" bolt holes, and a 1.811" pilot bore (see specs), the 1202-181 is the direct match. Universal Driveshafts stocks this part for immediate dispatch to get your vehicle back in service without delays.