3-2-1159A | 1310 Series Circular Flange Yoke , Holes: 8 x 0.394 Bolt circle Diameter: 3.996 ,Pilot: 2.954F

3-2-1159A 1310 Series Circular Flange Yoke — 8-Bolt, Female Pilot

The 3-2-1159A is a 1310 series circular flange yoke with an 8-hole bolt pattern. The bolt circle diameter is 3.996 inches with 0.394-inch bolt holes, the pilot diameter is 2.954 inches female, and the centerline-to-flat dimension is 2.000 inches. Per the product notes, this flange corresponds to a 1310 series interface with a 120 mm OD, 75 mm pilot, and 8 holes.

Specifications

• Part Number: 3-2-1159A
• Series: 1310
• Bolt Circle Diameter: 3.996 in
• Bolt Hole Diameter: 0.394 in
• Bolt Holes: 8
• Pilot Diameter: 2.954 in (female)
• Center U-Joint to Flat: 2.000 in
• Note: 1310 OD 120 — Pilot 75 mm — 8 holes

When fitting the 3-2-1159A, verify the companion flange bolt circle is 3.996 inches with 8 holes at 0.394-inch diameter. The 2.954-inch female pilot (approximately 75 mm) registers over the male pilot on the companion flange. This is a metric-influenced circular flange specification common on European differential and transfer case outputs where the 120 mm OD / 75 mm pilot pattern was standardized.

The 3-2-1159A carries 1310 series U-joint ears, distinguishing it from the 3-2-1159C (1480 series) which shares the same bolt circle and pilot dimensions but uses a heavier U-joint interface. Confirm the required U-joint series before ordering — both flanges look similar but are not series-interchangeable. Match bolt circle and pilot to your companion flange before ordering.