Product Description
PRECISION M8X1.25 THREAD CLEANING CHASER FOR RELIABLE TORQUE AND CLAMP LOAD
The ARP 912-0001 M8x1.25 Thread Cleaning Chaser is the quick, professional way to restore and prep M8x1.25 internal threads so fasteners seat correctly and torque readings stay accurate. Ideal before installing head studs/bolts, main bolts, accessory brackets and more, this ARP chaser cleans debris, light corrosion, and old sealant without removing base material—helping prevent galling, cross-threading, and false torque.
- M8 x 1.25 pitch, ARP quality and durability
- Preps threads for proper fastener engagement and consistent torque
- Great for engine builds, cylinder head service, and accessory installs
- Pairs perfectly with ARP Ultra-Torque® Assembly Lube 100-9909 or 100-9910 (10oz) to achieve repeatable clamp load
- Universal tool for any M8x1.25 threaded hole; commonly used during GM LS and similar builds
FAQ
WHAT DOES A THREAD CLEANING CHASER DO?
It cleans out debris, rust, and old sealant from an existing threaded hole so your fastener engages fully and torque readings are accurate.
IS THIS THE RIGHT SIZE?
This tool is M8 x 1.25. Verify your hole size/pitch before use. If you need M12x1.75, see ARP 912-0008.
CAN I USE IT LIKE A TAP?
It’s designed to clean and restore existing threads, not cut new ones. Use cutting taps only when creating new threads.
WHAT LUBE SHOULD I USE DURING ASSEMBLY?
For ARP fasteners, use ARP Ultra-Torque 100-9909 or 100-9910 10oz to achieve repeatable clamp load.
FITMENT / USE CASES
Universal for any M8x1.25 internal thread: cylinder head bolt holes, accessory brackets, timing covers, drivetrain and chassis locations using M8x1.25. Commonly used when preparing GM LS engine blocks that utilize M8x1.25 threaded holes.
CROSS-REFERENCE / RELATED ARP ITEMS
- ARP 912-0008 Thread Cleaning Chaser – M12 x 1.75
- ARP 100-9909 Ultra-Torque Assembly Lubricant
- ARP 100-9910 Ultra-Torque Assembly Lubricant – 10oz
- Shop All ARP at CPP Diesel
PROP 65
⚠️ California Residents: Cancer and Reproductive Harm — P65Warnings.ca.gov
| Brand | ARP (Automotive Racing Products) |
|---|---|
| Part Number | 912-0001 |
| Thread Size / Pitch | M8 x 1.25 |
| UPC | 672036022174 |
| GTIN-12 | 672036022174 |
| GTIN-14 | 00672036022174 |
| Shipping Info | Dimensions (for listing): 1.00" W x 1.00" H x 5.00" D. Shipping calculated at checkout. |
| Cross Reference | ARP 912-0008 (M12 x 1.75); ARP 100-9909 Ultra-Torque; ARP 100-9910 Ultra-Torque 10oz |
| E-Codes | N/A (tool) |
| Prop 65 | ⚠️ Cancer and Reproductive Harm — P65Warnings.ca.gov |
