Professional Snap-on 1/2" drive spline torque adaptor rated for 5,200 in-lbs, meeting military specs MS-33787 and MIL-W-89823. Chrome finish, SAE #28 with 7/8" hex, ideal for aircraft and high-tensile fasteners.
The Snap-on 1/2" Drive SAE #28, 7/8" Hex Spline Torque Adaptor (Model SRES28) is a precision-engineered tool specifically designed for servicing high-tensile strength spline nuts and bolts used in military and commercial aircraft applications. This professional-grade adaptor features advanced spline wrenching technology that engages fastener teeth over a wider area, significantly minimizing stress concentration and enabling the safe application of high torque loads up to 5,200 in-lbs without risking damage to either the fastener or the tool itself.
Manufactured to exacting military specifications including MS-33787 and MIL-W-89823, this chrome-finished torque adaptor combines durability with precision performance. The unique spline wrenching configuration provides exceptional versatility, allowing seamless use on ordinary six and 12-point fasteners while delivering advantages comparable to Snap-on's renowned Flank Drive® wrenching system. With dimensions precisely calculated for optimal performance (3 inches center-to-center length, 1.26-1.04 inch head diameter, and 1/2 inch head depth), this tool is an essential addition to any professional aerospace, military, or heavy-duty maintenance toolkit.
Snap-on's commitment to quality and precision is evident in every aspect of this torque adaptor. The chrome finish provides excellent corrosion resistance and durability, while the precision radial spline teeth ensure consistent, reliable performance across countless applications. Whether you're working on commercial aircraft maintenance, military equipment servicing, or heavy-duty industrial applications, this torque adaptor delivers the reliability and precision that professionals demand.
Key Features
- Military-grade spline wrenching technology for high-tensile strength fasteners
- Maximum recommended working torque of 5,200 in-lbs for demanding applications
- Complies with Military Specifications MS-33787 and MIL-W-89823
- Chrome finish for superior corrosion resistance and durability
- Works on six and 12-point fasteners with Flank Drive® system advantages
- Precise radial spline teeth minimize stress and prevent fastener damage
- SAE #28 spline size with 7/8" hex configuration
- 3 inches center-to-center length for optimal leverage and control
Technical Specifications
| Specification |
Value |
| Model Number | SRES28 |
| Drive Size | 1/2 inch |
| Spline Size (SAE) | #28 (7/8 inch) |
| Hex Size | 7/8 inch |
| Maximum Recommended Working Torque | 5,200 in-lbs |
| Length (Center to Center) | 3 inches |
| Head Diameter (Spline and Square) | 1.26-1.04 inches |
| Head Depth (Spline and Square) | 1/2 inch |
| Finish | Chrome |
| Military Specifications | MS-33787, MIL-W-89823 |
| Tool Type | Spline Torque Adaptor |
| Application | Aircraft, Military, Commercial, High-Tensile Fasteners |
