4-2-669 Flange Yoke 1550 Series , Pilot: 3.750 , Bolt Circle Dia: 4.750 , Holes: 4x 0.512 Centerline to Face: 2″ Rec Pattern

4-2-669 1550 Series Flange Yoke 4-Bolt Rectangular Pattern 4.750 Bolt Circle

The 4-2-669 is a 1550 series flange yoke with a 4-bolt rectangular bolt pattern configuration. Bolt hole diameter is 0.512" on a 4.750" bolt circle with a 3.750" pilot diameter. The CJ-to-flat dimension is 2.000".

Specifications

• Part Number: 4-2-669
• Series: 1550
• Bolt Holes: 4 x 0.512"
• Bolt Circle Diameter: 4.750"
• Pilot Diameter: 3.750"
• CJ to Flat: 2.000"

When fitting the 4-2-669, confirm the companion flange carries 4 holes at 0.512" diameter on a 4.750" bolt circle with a 3.750" pilot. The 0.512" bolt hole is slightly larger than the 0.500" found on the 1480-series 3-2-489; verify the fastener diameter matches the hole specification. The 3.750" pilot diameter must match the companion flange pilot bore for concentric alignment.

The 1550 series is positioned above the 1480 in the torque hierarchy and is specified for heavy commercial truck drivelines requiring greater capacity than the 1480 can provide. The 2.000" CJ-to-flat dimension on the 4-2-669 is longer than the 1.500" found on the 1480-series companion 3-2-489; account for this when calculating working clearances in the driveshaft geometry. Confirm the U-joints and mating yokes across the driveline are also rated 1550 series before ordering.