Performance Tool 1/2" Drive 2-5/8" Six-Slot Lock Nut Socket for Ford & GM 4WD — Chrome-Moly Durable

The Performance Tool W1270 is a heavy-duty 1/2" drive, 2-5/8" socket made to remove and install six-slot front axle lock nuts on select Ford and GM 4WD trucks.

This socket is a purpose-built service tool for older heavy-duty Ford and General Motors four-wheel-drive trucks. Machined from chrome-moly alloy steel and sized specifically for 2-5/8" six-slot lock nuts, the W1270 lets mechanics and DIYers use a standard 1/2" drive ratchet or breaker bar to apply the torque required for front axle service. It fits commonly encountered applications on late 1970s and early 1980s F-250/F-350 and early-to-mid 1970s GM K-series trucks.

Which trucks and years are compatible with this lock nut socket?

This tool is designed to match the six-slot front axle lock nuts used by Ford and GM in the era stated by the manufacturer. Confirm the lock nut diameter and slot pattern on your vehicle before purchasing to ensure a proper fit.

• Fits 1978–1984 Ford F-250 and F-350 4WD heavy-duty trucks
• Fits 1973–1981 GM K20, K2500, K30 and K3500 4WD trucks
• Intended for six-slot front axle lock nuts sized 2-5/8"
• Designed for use with a standard 1/2" drive tool (ratchet or breaker bar)

How durable and safe is the W1270 for axle service?

Manufactured from chrome-moly alloy steel, the socket is built to withstand the high torque needed for axle lock nuts without deforming. Its construction helps reduce rounding of nut slots and improves engagement compared with improvised tools.

• Chrome-moly (Cr-Mo) alloy steel resists wear and high torque
• Precision pocketing for reliable six-slot engagement
• 1/2" drive recess accepts common ratchets and breaker bars
• Plated finish for corrosion resistance and easier cleaning

How do I use this socket safely and effectively?

Seat the W1270 fully over the six-slot lock nut so the internal profile engages all slots evenly. Use a 1/2" drive breaker bar for removal and a torque wrench or proper installation technique when tightening to the vehicle manufacturer's specifications.

• Inspect nut slots and socket for burrs before use
• Fully engage socket on the nut to avoid slippage
• Apply steady torque with a 1/2" drive tool; use cheater bars only when safe
• Verify torque against factory specs after installation

Will this socket replace other specialized axle tools?

The W1270 is a targeted service piece for specific six-slot lock nuts and is not a universal axle tool. It complements a mechanic's kit where the lock nut size and slot pattern match; other axle types require their respective sockets or adapters.

• Not intended for spline-style or different-slot-pattern nuts
• Works as a dedicated replacement for OEM-style six-slot lock nuts
• Pairs with common 1/2" drive tools—no specialty driver required
• Saves time versus fabricating improvised driver shapes

Who is this for: The Performance Tool W1270 is for professional mechanics, restoration shops, and DIY enthusiasts working on late-1970s to early-1980s Ford and 1970s GM 4WD heavy-duty trucks that use 2-5/8" six-slot front axle lock nuts. Choose this socket if you need a robust, correctly sized driver that fits standard 1/2" drive tools and reduces the risk of nut damage during removal and installation.