Product Summary

Universal Fit, Single Joint Universal Joint Style

  • All steering universal joints have 3/4 weld-on ends
  • Features full compliment bearings and designed for the rigors of racing
  • Made from forged vanadium steel with a black oxide finish
  • One end as a 3/4"-36 Spline and the other, a 3/4"-20 Spline
  • Overall length measures 3.75" and has a 1.355" O.D.

Key Specs

MFG. Part #401-51221
Universal Joint StyleSingle Joint
End #13/4"-36 Spline
End #23/4"-20 Spline
Spline Count36/20

Need To Know

Free Shipping on Orders Over $149

Shipping Policies & FAQs

Quick and Easy Returns

Return Policy

Sweet Manufacturing 401-51221 Details

Don't jeopardize your safety with inferior quality steering components. Speedway offers only the finest steering U-joints available. Made by Sweet Manufacturing. All of these steering universal joints have 3/4 weld-on ends.

  • Full compliment bearings
  • Forged Vanadium steel yokes and u-joint
  • Highest quality for racing
  • Features needle bearing u-joints
  • U-Joint=3.875" L x 1.375" D
Learn more about u-joints and steering systems by reading our tech article. U-Joint Selection and Design.

Note: GM columns measure slightly less than 1" while IDIDIT and Flaming River columns measure a true 1".  DO NOT interchange these u-joints.



When purchasing U-Joints, 3 easy steps will help ensure that they will be correct for your application.

Be sure to measure the diameter of the shaft and count the number of splines on the shaft. Some shafts have a blank spot ground on one side. To get the correct number of splines, use a flat edge and cover the blank half of the shaft through the diameter and count the splines on the other half. Multiply that number by 2, thus giving you the total number of splines on the full circumference of the shaft.

Choose which shaft type best suits your application: 3/4" weld on, 3/4" DD or 1" DD.

With these two pieces of information at hand, refer to our chart to find the appropriate part number of the u-joint for your specific application.

Sweet Manufacturing 401-51221 Specifications

MFG. Part #401-51221
BrandSweet Manufacturing
Universal Joint StyleSingle Joint
End #13/4"-36 Spline
End #23/4"-20 Spline
Spline Count36/20
Spline End3/4"-36 x 3/4"-20
Overall Length3.75"
Outside Diameter1.355"
Max Operating Angle30 °
Material TypeSteel
Sold in QuantityEach