Professional-grade 19-21mm metric flare nut wrench with Flank Drive® technology delivering 15-20% more turning power. Heat-treated alloy steel with nickel-chrome plating for superior corrosion protection and durability.
The Snap-on 19-21mm 6-Point Metric Flank Drive Double End Flare Nut Wrench (Model RXFMS1921B) is a professional-grade precision tool designed for demanding automotive, aerospace, and industrial applications. Manufactured from special alloy steel and heat-treated to exacting standards, this wrench delivers optimum strength and durability for critical fastening operations. The innovative Flank Drive® system grips the fastener flats with superior precision, providing up to 15-20% more turning power compared to conventional wrenches, making it ideal for high-torque applications where precision and reliability are paramount.
Featuring a continuous arc design, this double-end flare nut wrench distributes stress evenly across the entire wrench opening radius, resulting in greater structural strength and extended tool life. The tough, durable nickel-chrome plating produces a mirror-like finish that not only enhances the tool's appearance but also provides exceptional protection against corrosion and rust in harsh working environments. The wrench is meticulously sized and balanced for optimum comfort during extended use, reducing operator fatigue and improving work efficiency. With dimensions of 223mm overall length and 32-34mm outside diameter, this metric wrench is perfectly suited for precision work on flare nut connections.
This professional tool meets ASME® B107.100 standards and is backed by Snap-on's reputation for manufacturing excellence. Whether you're working in aviation and aerospace, military and defense, oil and gas, power generation, or general industrial maintenance, this double-end flare nut wrench delivers the precision, strength, and reliability that professional technicians demand. The 6-point design ensures secure fastener engagement while minimizing damage to delicate fastener heads.
Key Features
- Flank Drive® system provides 15-20% more turning power for superior fastener engagement
- Manufactured from special alloy steel and heat-treated for optimum strength and durability
- Continuous arc design distributes stress evenly for greater structural strength
- Tough nickel-chrome plating with mirror-like finish protects against corrosion and rust
- 6-point design ensures secure fastener grip while minimizing damage to fastener heads
- Sized and balanced for optimum comfort and reduced operator fatigue
- Double-end design provides two wrench sizes in one tool for convenience
- Meets ASME® B107.100 professional standards for tool quality and safety
Technical Specifications
| Specification |
Value |
| Model Number | RXFMS1921B |
| Size Range | 19-21 mm |
| Style | 6-Point Double End Flare Nut Wrench |
| Overall Length | 223 mm |
| Outside Diameter (A-B) | 32-34 mm |
| Head Depth (C-D) | 12-13 mm |
| Material | Special Alloy Steel, Heat-Treated |
| Finish | Nickel-Chrome Plating |
| Standard Compliance | ASME® B107.100 |
| Wrench Type | Metric Flank Drive® Double End |
| Corrosion Resistance | Mirror-Like Chrome Finish |
| List Price | $71.75 |
