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Black 3/8 inch drive impact universal joint with pinless design and corrosion-resistant finish

TEKTON

TEKTON 3/8 Inch Drive Impact Universal Joint SIA12102

SKU CH-H84J-4Y0BY

A 3/8 inch drive impact universal joint with a pinless design operating at a 30-degree angle, made from 8660 and 4140 steel with a manganese phosphate finish for corrosion resistance

  • Product colorBlack
  • Works around obstructions with 30-degree operating angle
  • Pinless design reaches tight spots without disassembly
  • Premium 8660 Ni-Cr-Mo steel delivers superior strength
  • 4140 Cr-Mo steel construction withstands high torque
  • Corrosion-resistant manganese phosphate finish protects long-term

3/8 Inch Drive Impact Universal Joint

The TEKTON SIA12102 is a 3/8 inch drive impact universal joint built for professional mechanics and serious DIYers. It connects directly to impact sockets and extensions to reach fasteners around obstructions. The tool is manufactured from premium 8660 Ni-Cr-Mo and 4140 Cr-Mo steel for high strength.

Pinless design installs directly onto drive tools

Installation is straightforward: press the joint onto any 3/8 inch drive ratchet, breaker bar or impact gun and attach the socket. The pinless mechanism removes the weak point of a traditional spring pin, so there is no pin to shear or fall out under heavy torque. A black manganese phosphate finish resists corrosion in shop environments.

Suits technicians working in confined engine bays

This joint suits technicians who need up to 30 degrees of angular movement to access tight fasteners without removing surrounding components. It is not for users who require a straight extension or a fixed socket adapter. Buyers needing a 1/2 inch or 1/4 inch drive size should look at a different joint.

How it compares

Measured against everything we stock in Ratchets, Sockets & Drive Tools, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 80% of the 418 comparable items (median $20.99).

Specifications

Product
Brand nameTEKTON
Product colorBlack

Questions about this item

How do I verify the TEKTON SIA12102 impact universal joint is working correctly after setup?

Attach it to a 3/8 inch drive tool, engage a fastener, and apply torque; the pinless mechanism should pivot smoothly up to 30 degrees without binding, delivering the force needed to break loose stubborn fasteners.

What comes in the box with the TEKTON SIA12102 and what must I buy separately?

The box contains the 3/8 inch drive impact universal joint made from 8660 Ni-Cr-Mo and 4140 Cr-Mo steel with a manganese phosphate finish; you must supply a 3/8 inch drive ratchet or impact gun and compatible impact sockets.

How do I choose the right version of the TEKTON impact universal joint for my needs?

The SIA12102 is a single 3/8 inch drive model with a pinless design operating at 30 degrees; select it when you need maximum flexibility around obstructions in tight spaces with a 3/8 inch drive system.

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