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12mm Upper Knuckle Stud Kit

SKU MCHT-321Category


Availability: In stock

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We are now offering upper knuckle stud kits to save you time and money. This is a great way to add knuckle parts to your cart with just one mouse click!

These are high quality parts Made In Japan! Please note this kit includes a cone washer which is only used for the steering arm.

Studs and other hardware are available individually. More info here.

Kit includes:

  • (1) Knuckle Stud with E12 provision
  • (1) Knuckle Stud Cone Washer
  • (1) Knuckle Stud Flat Washer
  • (1) Knuckle Stud Nut


Important Installation Notes: Knuckle studs can be torqued up to 45 ft-lbs, however this may not be possible due to the condition of your knuckles. The important factor is that pressure is created at the surface between the steering arm and the knuckle (this surface forms a very large area to distribute steering forces and prevent stud shear failure). Therefore, so long as the knuckle studs are in place, the nuts will be able to create this high pressure at this surface.

You should be able to get at least 20 ft-lbs torque on each stud which is sufficient when combined with Loctite. Keep in mind you must have sufficient stud length for the nut to have threads to thread onto, meaning that the very last thread of each stud should not be less than 1.25″ away from the surface of the knuckle.

To ensure long life out of each stud, we strongly recommend checking the torque of each nut (71 ft-lbs) every time you change your engine oil.


This kit also fits the lower steering arms of a FJ80 knuckle.

Eight kits needed per truck.


Weight 0.22 lbs
Dimensions 2 × 0.5 × 0.5 in

Proposition 65 Warning for California Consumers

WARNING: Products we sell can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to p65warnings.ca.gov.

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