Professional-grade 1/2" drive open-end wrench with innovative tethering system for safe high-altitude work. Heat-treated alloy steel construction with 2,400 in-lb torque rating and nickel-chrome plating.
The Snap-on Tools@Height 1/2" Drive 1-5/16" Open-End Wrench (Model THSC42) is a professional-grade tool engineered for demanding work environments, particularly in aviation, aerospace, and high-altitude applications. This specialized wrench features the innovative Tools@Height System that tethers each tool with its own lanyard, significantly minimizing tool exchanges and reducing the critical risk of drops in elevated work areas. The wrench is manufactured from premium special alloy steel that has been heat-treated to deliver optimum strength and durability, ensuring reliable performance even under challenging conditions.
Designed with meticulous attention to detail, the THSC42 features engineered attachment points that integrate seamlessly without interfering with the tool's core functionality. The nickel-chrome plating provides superior corrosion protection while maintaining easy cleaning capabilities for maintenance in field conditions. With a maximum recommended working torque of 2,400 in-lb, this wrench is sized for optimum comfort and balance, reducing operator fatigue during extended use. The compact design with an outside diameter of 2-19/32 inches and a total depth of 5/8 inches makes it ideal for working in confined spaces while maintaining excellent control.
This professional tool is part of Snap-on's comprehensive Tools@Height collection, designed to meet the stringent safety and performance requirements of industries including aviation and aerospace, military and defense, oil and gas, power generation, and general heavy-duty maintenance. The wrench's lightweight construction at just 0.46 lb (0.21 kg) combined with its robust engineering makes it an essential addition to any professional tool collection, particularly for teams working at heights where safety and reliability are paramount.
Key Features
- Snap-on Tools@Height tethering system minimizes tool exchanges and reduces drop risk
- Engineered attachment points integrated without interfering with tool functionality
- Manufactured from premium special alloy steel with heat treatment for optimum strength
- Nickel-chrome plating provides superior corrosion protection and easy maintenance
- Optimized sizing for comfort, balance, and operation in confined spaces
- Maximum recommended working torque of 2,400 in-lb for reliable performance
- Lightweight construction at 0.46 lb reduces operator fatigue during extended use
- Designed for aviation, aerospace, military, defense, and heavy-duty applications
Technical Specifications
| Specification |
Value |
| Product Model | THSC42 |
| Drive Size | 1/2 inch |
| Wrench Size | 1-5/16 inches |
| Wrench Type | Open-End Crowfoot |
| Material | Special alloy steel, heat-treated |
| Finish | Nickel-chrome plating |
| Outside Diameter (Dimension A) | 2-19/32 inches |
| Head Depth (Dimension E) | 7/16 inch |
| Total Depth (Dimension F) | 5/8 inch |
| Center to Center (Dimension C) | 2 inches |
| Weight | 0.46 lb (0.21 kg) |
| Maximum Recommended Working Torque | 2,400 in-lb |
| System | Tools@Height with tethering lanyard |
| Manufacturer | Snap-on Incorporated |
| List Price | $94.25 |
| Availability | Backorder - Estimated in stock 05/30/2026 |
