Lisle Pro Shear Socket 2-3/8" — 1/2" Drive, Four‑Pin Engagement for 2021+ Chevy/GMC DRW

The Lisle 31620 Pro Shear Socket (2-3/8") is a hardened 1/2" drive tool designed to remove and install the circular hub nut on full‑floating dual‑rear‑wheel hubs used on 2021 and newer Chevrolet Silverado and GMC Sierra trucks.

When working on dual‑rear‑wheel (DRW) axle hubs it's critical to have a socket that matches the outer diameter of the axle nut and engages the shear design of the hub-retaining nut. The Lisle 31620 is shaped to engage the four‑pin pattern on the hub nut and fits a 2‑3/8" outer diameter. Finished in black oxide and heat treated for toughness, this socket is intended for manual or powered hand tools with a 1/2" drive—avoid impact tools to protect the socket's shear features.

What trucks and hub sizes is this socket made for?

This socket is made specifically to fit the hub nut found on many 2021 and newer Chevrolet Silverado and GMC Sierra dual‑rear‑wheel models with 11.5" or 12" full‑floating axle hubs. It can also be used on other vehicles when the axle nut measures 2‑3/8" outer diameter and uses a similar four‑pin retaining pattern.

• Primary fit: 2021+ Chevy Silverado and GMC Sierra DRW hubs (11-1/2" and 12").
• Socket O.D.: 3.00"; fits axle nut O.D. of 2‑3/8".
• Four‑pin shear circle engagement for full‑floating hub nuts.
• May work on other trucks with matching nut O.D. and pin pattern.

How durable and safe is the Lisle 31620 for shop use?

The socket is heat‑treated and hardened to withstand repeated use with standard 1/2" drive tools. A black oxide finish helps resist surface corrosion and reduces glare in bright work environments. Note: it is not rated for impact gun use—impacts can deform the shear interface and compromise the tool.

• Material: hardened alloy steel for wear resistance.
• Finish: black oxide for corrosion protection.
• Drive: 1/2" square drive compatible with breaker bars and torque wrenches.
• Warning: do not use with impact guns or air tools.

How do you use this socket when changing or servicing hub assemblies?

To remove or install the hub nut, position the socket over the nut so the four‑pin pattern engages the circular shoulder. Use a 1/2" drive breaker bar or torque wrench to apply steady torque; avoid sudden impacts. After installation, torque to the vehicle manufacturer's specification and verify endplay or bearing preload as required.

• Seat the socket fully over the hub nut so shear pins engage.
• Use a 1/2" drive torque tool or breaker bar—no impact tools.
• Follow OEM torque and bearing preload procedures after installation.
• Inspect socket face for wear before reuse to ensure proper engagement.

Will this socket work on non‑GM vehicles or other axle sizes?

It may work on other makes and models that use a 2‑3/8" O.D. axle nut with a similar circular four‑pin retention design. Always measure the nut O.D. and compare the pin pattern before attempting use; mismatched engagement can slip and damage components.

• Measure axle nut O.D. — must be approximately 2‑3/8".
• Confirm four‑pin circular engagement matches the socket face.
• Mismatches risk slippage and tool or component damage.

Who is this for: The Lisle 31620 Pro Shear Socket is aimed at professional technicians, fleet mechanics, and knowledgeable DIYers who service full‑floating dual‑rear‑wheel hubs on late‑model GM trucks. It's a specialized tool for hub nut removal and installation where a precise 2‑3/8" engagement and a 1/2" drive are required; it suits shops that prefer durable, hand‑tool‑grade sockets and follow OEM torque and bearing procedures.