4-2-679 Flange Yoke 1550 Series , Pilot: 3.750 , Bolt Circle Dia: 4.750 , Holes: 4x 0.500 Centerline to Face: 1.500″ Rec Bolt Pattern

4-2-679 1550 Series Flange Yoke 4.750" Bolt Circle 3.750" Pilot 4 Holes

The 4-2-679 is a 1550 series flange yoke with a 4.750" bolt circle diameter, 4 holes at 0.500" diameter, a 3.750" pilot diameter, and a CJ-to-flat of 1.500". The bolt pattern is rectangular (rec) configuration.

Specifications

• Part Number: 4-2-679
• Series: 1550
• Bolt Circle Diameter: 4.750"
• Bolt Hole Diameter: 0.500"
• Bolt Holes: 4
• Pilot Diameter: 3.750"
• CJ to Flat: 1.500"

When fitting the 4-2-679, verify the companion flange has a 4.750" bolt circle with 4 holes at 0.500" diameter and a 3.750" pilot bore. The rectangular bolt pattern means the four holes are arranged in two pairs rather than a square pattern — confirm the bolt hole orientation matches your companion flange before ordering. The 3.750" pilot must seat fully in the companion bore.

The 4-2-679 accepts 1550 series U-joints (1.375" cap diameter, 4.964" span) at the ear end. This yoke shares the same 4.750" bolt circle, 3.750" pilot, and 0.500" holes as the 1410 series 3-2-559 — however, the ear geometry differs between series. Confirm the 1550 U-joint cap span (4.964") matches the yoke bore width before assembly.