Professional-grade 3/8" drive torque adaptor with dual locking mechanism, 420 in-lbs capacity, precision heat-treated alloy steel construction, and nickel-chrome corrosion-resistant finish for reliable fastening in demanding industrial applications.
The Snap-on Tools@Height 3/8" Drive 3/8" Non-Spline Torque Adaptor (Model THFRDH121) is a precision-engineered tool designed for professional mechanics and technicians working in demanding industrial environments. This adaptor features an innovative locking hole design on all four sides that works in conjunction with a precision pin to significantly reduce the risk of socket, adaptor, or extension misalignment during torque applications. The dual locking mechanism ensures secure engagement and prevents inadvertent tool disengagement, making it ideal for critical fastening operations where accuracy and safety are paramount.
Crafted from premium special alloy steel and subjected to rigorous heat treatment processes, this torque adaptor delivers exceptional strength and durability for extended service life. The nickel-chrome finish provides superior corrosion resistance and maintains a clean, professional appearance through regular use and maintenance. With a working torque capacity of 420 in-lbs, this adaptor handles a wide range of fastening applications across aviation, aerospace, military, defense, oil and gas, power generation, and general industrial sectors. The double hex (12-point) configuration allows sockets to engage single hex fasteners every 30 degrees rather than every 60 degrees, providing superior access in confined and restricted work spaces.
This Tools@Height adaptor incorporates radius-edged design elements that resist damage and nicks during regular use, ensuring long-term reliability. The center-to-center length measurement facilitates accurate torque calculations for precision work. Featuring robust construction with thicker design in larger sizes for enhanced strength, this non-spline adaptor meets professional standards for critical fastening applications. The 3/8" drive size with 3/8" non-spline configuration makes it compatible with standard socket and drive tool systems used across professional maintenance and repair operations.
Key Features
- Dual locking hole design on all four sides with precision pin combination to prevent socket and adaptor misalignment
- Precision heat-treated special alloy steel construction delivers exceptional strength and long-term durability
- Nickel-chrome finish provides superior corrosion resistance and easy maintenance
- Double hex (12-point) configuration enables socket engagement every 30 degrees for superior access in restricted spaces
- 420 in-lbs working torque capacity suitable for professional fastening applications across multiple industries
- Radius-edged design resists damage and nicks during regular use and handling
- Center-to-center length measurement facilitates accurate torque calculations for precision work
- Compatible with standard 3/8 inch drive tools and socket systems used in professional maintenance
Technical Specifications
| Specification |
Value |
| Model Number | THFRDH121 |
| Drive Size | 3/8 inch |
| Adaptor Type | Non-Spline Torque Adaptor |
| Working Torque Capacity | 420 in-lbs |
| Material | Special Alloy Steel, Heat-Treated |
| Finish | Nickel-Chrome |
| Socket Configuration | Double Hex (12-Point) |
| Dimension A - Head Diameter Wrench End | 0.570 inches |
| Dimension B - Head Diameter Square End | 0.750 inches |
| Dimension C - Head Depth Wrench End | 5/16 inch |
| Dimension D - Head Depth Square End | 7/16 inch |
| Dimension E - Center to Center Length | 2 inches |
| Weight | 0.084 lb (0.04 kg) |
| Design Features | Locking holes on all four sides, radius-edged design, precision pin combination |
| Recommended Applications | Aviation, Aerospace, Military, Defense, Oil & Gas, Power Generation, Industrial Maintenance |
