Professional-grade 5/16–3/8" 12-point SAE Flank Drive® S-shaped box wrench with 15–20% more turning power, high-strength alloy steel construction, nickel-chrome finish, and ASME B107.100 compliance for industrial and aerospace applications.
The Snap-on 5/16–3/8" 12-Point SAE Flank Drive® S-Shaped Box Wrench (Model SBX1012) is a professional-grade hand tool engineered for demanding automotive, industrial, and aerospace applications. This versatile wrench features the innovative Flank Drive® wrenching system that grips the fastener flats to deliver up to 15–20% more turning power compared to conventional wrenches, reducing fastener rounding and extending tool life. The S-shaped design provides optimal reach and access in confined spaces, making it ideal for technicians working on complex assemblies where standard wrenches cannot fit. Constructed from high-strength alloy steel, this wrench combines durability with precision engineering to withstand the rigors of professional use.
The wrench features a 12-point configuration that allows for multiple engagement angles, providing greater versatility when working with various fastener orientations. The nickel-chrome finish offers superior corrosion resistance and maintains a professional appearance even after years of use in demanding environments. With a length of 3-3/4 inches and head dimensions precisely engineered to ASME B107.100 standards, this tool delivers consistent performance across industrial, aviation, aerospace, military defense, oil and gas, power generation, railroad, and general industry applications. The dual-size capability (5/16–3/8 inch) makes this a practical addition to any professional tool collection, eliminating the need for multiple single-size wrenches.
Snap-on's commitment to quality and innovation is evident in every aspect of this tool's design and manufacture. Whether you're performing routine maintenance or tackling complex mechanical repairs, the SBX1012 S-Shaped Box Wrench delivers the reliability, strength, and precision that professional technicians demand. This wrench is backed by Snap-on's reputation for excellence and is designed to provide years of dependable service in the most challenging work environments.
Key Features
- Flank Drive® wrenching system grips fastener flats for up to 15–20% more turning power
- High-strength alloy steel construction provides superior durability and extended tool life
- 12-point configuration allows multiple engagement angles for versatile fastener access
- S-shaped design enables optimal reach and access in confined and complex spaces
- Nickel-chrome finish offers superior corrosion resistance and easy maintenance
- Dual-size capability (5/16–3/8 inch) reduces need for multiple wrenches
- ASME B107.100 compliant for professional industrial standards
- Precision-engineered head dimensions for consistent performance
Technical Specifications
| Specification |
Value |
| Model Number | SBX1012 |
| Size | 5/16–3/8 inches |
| Style | 12-Point S-Shaped Box Wrench |
| Length | 3-3/4 inches |
| Outside Diameter (Dimension A) | 15/32–9/16 inches |
| Head Depth (Dimension C) | 9/16–7/32 inches |
| Material | High-strength alloy steel |
| Finish | Nickel-chrome |
| Standards Compliance | ASME B107.100 |
| Wrenching System | Flank Drive® (15–20% more turning power) |
| Point Configuration | 12-point for multiple engagement angles |
| Design | S-shaped for confined space access |
