ARP M8 x 1.25 x 30 12-point black oxide bolts are precision fasteners engineered for demanding engine assembly and high-performance applications. The 12-point head design provides excellent access and engagement with appropriate sockets, while the black oxide finish offers corrosion resistance and a professional appearance. These metric-sized bolts are manufactured to exacting tolerances for reliable clamping force and repeatability across multiple installations.
These bolts are ideal for engine block work, head fastening, and other critical engine bay assemblies where consistent tension and durability are essential. The M8 x 1.25 metric thread specification and 30mm length make them compatible with standard metric engine fastening points. ARP is recognized for producing quality fasteners used in both street and race engine builds. Whether you're performing engine maintenance, rebuilding, or upgrading your engine, these bolts deliver the performance-grade fastening you need.
Key Features & Benefits
- M8 x 1.25 x 30 Metric: Metric thread specification with 1.25mm pitch and 30mm length for standard engine fastening applications.
- 12-Point Head Design: 12-point head geometry allows efficient socket engagement and controlled tightening on critical assemblies.
- Black Oxide Finish: Corrosion-resistant black oxide coating provides durability and rust protection in engine environments.
- ARP Quality: Precision-manufactured fastener trusted for performance engine builds and demanding automotive applications.
Specifications
| Brand | ARP |
| Model/MPN | 671-1003 |
| Thread Size | M8 x 1.25 |
| Length | 30mm |
| Head Style | 12-Point |
| Finish | Black Oxide |
Ideal Applications
- Engine block and head fastening
- High-performance engine assembly and rebuilds
- Metric engine fastening and repairs
- Performance automotive engine work
