STEELMAN JS-60383 M12-1.25 Metric Split Die Thread Chaser
Professional Thread Repair - STEELMAN M12-1.25 Metric Split Die Thread Chaser (JS-60383)
Eliminate Cross-Threading on Damaged Wheel Studs and Brake Bolts
The STEELMAN M12-1.25 Metric Split Die Thread Chaser repairs damaged threads on wheel studs, brake bolts, and suspension fasteners by starting behind the damaged area. This professional-grade tool exceeds ASME torque requirements by 150% and restores damaged M12-1.25 threads without cross-threading risk.
Built from hardened SKD11 alloy steel, this split die thread chaser features dual indexing pins that lock the die halves in perfect alignment during operation.
Key Features and Benefits
Perfect For Professional Applications
- Wheel stud thread restoration on cars and light trucks.
- Brake caliper bolt repair for disc brake service.
- Suspension component fastener cleanup and preparation.
- Fleet maintenance where damaged threads cause downtime.
- Tire shop operations during wheel service.
Technical Specifications
| Specification | Value |
|---|---|
| Thread Size | M12 x 1.25 Metric |
| Material | Hardened SKD11 Alloy Steel |
| Drive Size | 1-Inch Hex |
| Dimensions | 1.15" L x 1.01" W x 0.38" H (29.2 mm x 25.7 mm x 9.7 mm) |
| Weight | 0.06 lb (27 g) |
| Quantity | 1 Tool |
| Design | Split Die with Alignment Pins |
| Usage | Hand Tools Only - No Impact Use |
| Compatibility | 1" Socket, Combination or End Wrench |
| Warranty | Lifetime Limited Warranty |
How to Use This Thread Chaser
Using this metric thread chaser requires no special equipment beyond standard hand tools. The split design makes operation straightforward and virtually foolproof compared to traditional threading methods.
- Clean debris from the damaged thread area using a wire brush.
- Slide the split die over the stud, positioning it behind the damaged threads.
- Install a 1-inch deep socket, combination wrench, or end wrench on the hex.
- Turn clockwise with steady pressure, allowing the die to track onto good threads.
- Continue through the damaged area with smooth, consistent rotation.
- Back the die off and test thread quality with the intended fastener.
Get Professional Thread Repair Results
Don't let damaged threads delay your repairs or force unnecessary part replacements. This hardened steel thread chaser delivers clean, accurate results that last.
Order your STEELMAN M12-1.25 Metric Split Die Thread Chaser today for fast, professional thread restoration.
Frequently Asked Questions
How does this compare to using a standard tap for thread repair?
This split die starts behind damage and tracks on good threads, while taps must start at the thread opening and often bind or cross-thread. The split design eliminates alignment issues and allows repair without removing the stud, saving time and reducing the risk of breaking corroded fasteners during extraction.
Can I use this with impact tools or air ratchets?
No, this thread chaser is designed for hand tools only. Impact or power tools can damage threads and will void the warranty. Use with manual ratchets, combination wrenches, or end wrenches for proper control and thread protection. The controlled torque prevents over-cutting and ensures clean thread restoration.
Will this work on both right-hand and left-hand threads?
This tool is designed for standard right-hand M12-1.25 threads only. It will not work properly on left-hand threaded applications. Always verify thread direction before use to prevent damage to both the tool and fastener. Most automotive applications use right-hand threads, but some wheel studs may be left-hand.
What vehicles commonly use M12-1.25 wheel studs?
Many European imports including BMW, Mercedes-Benz, Audi, and Volkswagen use M12-1.25 threads on wheel studs and brake components. Also found on some Japanese vehicles and commercial trailers with metric wheel assemblies. This fine thread pitch provides higher clamping force than coarse threads for critical safety applications.
How do I know if the threads are properly restored?
After chasing, the original nut or bolt should thread on smoothly by hand for several turns before requiring wrench tightening. Properly restored threads show clean, consistent thread profile with no binding or cross-threading. Test fit with the actual hardware you plan to install to ensure proper engagement and torque specifications.
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