Professional 3/4-7/8" SAE Flank Drive® double end flare nut wrench with 15-20% more turning power, nickel-chrome finish, and ASME® B107.100 compliance for precision fastener work.
The Snap-on 3/4–7/8" 6-Point SAE Flank Drive® Double End Flare Nut Wrench (Model RXFS2428B) is a professional-grade tool engineered for precision work on flare nuts in automotive, aerospace, and industrial applications. Manufactured from special alloy steel and heat-treated to exacting standards, this wrench delivers optimum strength and durability for demanding work environments. The innovative Flank Drive® system grips the fastener flats with superior contact, providing up to 15–20% more turning power compared to conventional wrenches, reducing the risk of fastener damage and rounding.
This double-end wrench features a continuous arc design that intelligently distributes stress over the entire wrench opening radius, ensuring greater structural strength and extended tool life. The 9-1/2 inch overall length provides optimal reach and leverage for accessing hard-to-reach fasteners. The wrench is finished with tough, durable nickel-chrome plating that produces a mirror-like finish, effectively protecting against corrosion while making maintenance and cleaning effortless. Each wrench is precisely sized for comfort and balance, reducing operator fatigue during extended use.
Conforming to ASME® B107.100 standards, this SAE flare nut wrench is an essential addition to any professional tool collection. Whether you're working on hydraulic lines, fuel systems, or transmission cooler lines, this precision instrument delivers reliable performance and exceptional value for technicians and maintenance professionals across aviation, aerospace, military, defense, oil and gas, power generation, and heavy-duty fleet maintenance industries.
Key Features
- Flank Drive® system provides up to 15-20% more turning power than conventional wrenches
- Continuous arc design distributes stress over entire wrench opening radius for greater strength
- Manufactured from special alloy steel and heat-treated for optimum strength and durability
- Tough nickel-chrome plating provides mirror-like finish and superior corrosion protection
- Double-end design with 6-point SAE sizing for versatile fastener engagement
- 9-1/2 inch overall length for optimal reach and leverage
- Sized for comfort and balance to reduce operator fatigue
- ASME® B107.100 compliant professional-grade tool
- Ideal for hydraulic lines, fuel systems, and transmission cooler line applications
- Suitable for aviation, aerospace, military, defense, oil and gas, and industrial maintenance
Technical Specifications
| Specification |
Value |
| Model Number | RXFS2428B |
| Size | 3/4–7/8 inches |
| Style | 6-Point SAE |
| Type | Double End Flare Nut Wrench |
| Overall Length | 9-1/2 inches |
| Outside Diameter (Dimension A-B) | 1-1/4–1-27/64 inches |
| Head Depth (Dimension C-D) | 1/2–5/8 inches |
| Material | Special alloy steel, heat-treated |
| Finish | Nickel-chrome plating |
| Design Feature | Flank Drive® system with continuous arc design |
| Standards Compliance | ASME® B107.100 |
| Turning Power Advantage | 15-20% more than conventional wrenches |
| Application | Flare nuts on hydraulic lines, fuel systems, transmission cooler lines |
| Industries | Aviation, Aerospace, Military, Defense, Oil and Gas, Power Generation, Heavy Duty Maintenance |
| List Price | $70.75 |
