Professional 3/8" 12-Point SAE T-Handle Ratcheting Box Wrench engineered for high-tensile spline fasteners. Military-grade specifications, chrome finish, and precision spline teeth design for maximum torque application with minimal fastener damage.
The Snap-on 3/8" 12-Point SAE T-Handle Ratcheting Box Wrench (Model RTB12) is a professional-grade precision tool engineered for servicing high-tensile strength spline nuts and bolts. This specialized wrench features advanced spline wrenching technology developed by Snap-on to deliver superior performance in demanding industrial applications. The 12-point design with precise radial spline teeth engages fastener teeth over a wider contact area, effectively minimizing stress concentration and enabling application of high torque while reducing the risk of damage to both the fastener and the tool itself.
Constructed from premium chrome-plated steel, this ratcheting box wrench complies with Military Specification MS-33787 and MIL-W-8999, ensuring reliability in aerospace, aviation, military, and heavy-duty industrial environments. The T-handle design provides ergonomic control and leverage, while the ratcheting mechanism allows for efficient fastening and unfastening operations without repositioning. With a 12-3/32" handle length and 3" ratchet length, this tool is optimally sized for precision work in confined spaces and tight applications.
The RTB12 is an essential component for maintenance professionals working in aviation and aerospace, military and defense, oil and gas, power generation, railroads, and general industry applications. Its robust construction, military-grade specifications, and Snap-on quality guarantee make it a trusted choice for fleet maintenance operations and heavy-duty industrial work where precision and reliability are non-negotiable.
Key Features
- 12-Point spline wrenching design for high-tensile strength fasteners
- Precise radial spline teeth minimize stress and prevent fastener damage
- Chrome finish provides superior rust and corrosion resistance
- Military Specification compliant (MS-33787 and MIL-W-8999)
- T-Handle design with 12-3/32" length for ergonomic control and leverage
- Ratcheting mechanism allows efficient fastening without repositioning
- 3" ratchet length optimized for confined spaces and tight applications
- High-torque capability for demanding industrial applications
Technical Specifications
| Specification |
Value |
| Model Number | RTB12 |
| Size | 3/8 inches |
| Point Style | 12-Point |
| Wrench Type | SAE T-Handle Ratcheting Box Wrench |
| Outside Diameter (Dimension A) | 29/32 inches |
| Ratchet Length (Dimension B) | 3 inches |
| Handle Length (Dimension C) | 12-3/32 inches |
| Depth (Dimension D) | 3/8 inches |
| Material | Chrome-plated steel |
| Finish | Chrome for rust resistance |
| Military Specifications | Complies with MS-33787 and MIL-W-8999 |
| Spline Technology | Snap-on spline wrenching for high-tensile strength fasteners |
| List Price | $62.75 |
| Availability | Backorder - Estimated in stock 05/23/2026 |
| Warranty | Snap-on manufacturer warranty included |
