N3R-83-627 – Cv Flange Yoke – Ball Stud Dia 0.91″ – Bolt Circle Dia 4.25″ – Bolt Hole Dia 0.41″

N3R-83-627 Neapco 3R Series CV Flange Yoke

The N3R-83-627 is a Neapco 3R series CV flange yoke, light-duty (LD) class. It features a 4.25" bolt circle diameter with a 3.125" pilot diameter (type F), a 0.91" ball stud diameter, and a stud socket dimension of 0.910". Bolt hole diameter is 0.41" and the CL-to-face is 1.69". Lube port: none.

Specifications

• Part Number: N3R-83-627
• Brand: NEAPCO
• Series: 3R
• Class: LD
• Bolt Circle Diameter: 4.25"
• Pilot Diameter: 3.125" (Type F)
• Ball Stud Diameter: 0.91"
• Stud Socket Dimension: 0.910"
• Bolt Hole Diameter: 0.41"
• CL to Face: 1.69"
• Lube: No

When fitting the N3R-83-627, verify the companion flange bolt circle is 4.25" and the pilot diameter is 3.125". The type F pilot registers against the flange face — confirm the OD seats without interference. The 0.91" ball stud diameter is significantly larger than the 0.5" stud used in 1310 and 1330 series CV flanges; this is a distinguishing feature of the 3R series CV geometry.

The 3R series is a heavy-duty U-joint series with a larger cap and ball stud geometry than the common 1310/1330/1350 automotive series. The Neapco N3R-83-627 is an OEM-equivalent CV flange for this series. The stud socket dimension of 0.910" matches the ball stud diameter — confirm both against the CV socket depth in the companion assembly.

The 4.25" bolt circle and 3.125" pilot diameter are the primary fitment specs for the N3R-83-627. The CL-to-face of 1.69" sets the joint phasing geometry; confirm this against driveline assembly drawings. No lube port is present — inspect the ball socket at service intervals.