Socket Sets On Rail 1/4″, 3/8″ & 1/2″in drive
Cold-forged chrome molybdenum flat drive sockets in 1/4″, 3/8″, and 1/2″ drive, with full flat surface contact for reduced wear and higher torque transmission.
More Information
Koken Flat Drive Socket Sets use a flat surface contact design between socket and fastener to reduce wear and enable higher torque transmission than conventional hex sockets. Available in 1/4″, 3/8″, and 1/2″ drive, the sockets are cold-forged and heat-treated from chrome molybdenum alloy. They meet and exceed the requirements of DIN 3129 and ISO 2572-2. Manufactured in Japan by Koken.
Key Features
- Flat drive system — full flat surface contact between socket and fastener reduces wear and increases torque transmission.
- Cold-forged, heat-treated chrome molybdenum alloy construction for durability and long service life.
- Meets and exceeds DIN 3129 and ISO 2572-2 standards.
- Available in 1/4″, 3/8″, and 1/2″ drive sizes.
- Manufactured in Japan by Koken to precision engineering standards.
Typical Applications
- Torque wrench work requiring higher torque transmission than standard hex sockets
- Applications where fastener and socket wear is a concern
- Precision assembly and maintenance requiring standards-compliant tooling
- Industrial and workshop use across 1/4″, 3/8″, and 1/2″ drive setups
Koken Flat Drive Socket Sets Specifications
| Spec | Detail |
|---|---|
| Drive Sizes | 1/4″, 3/8″, 1/2″ |
| Contact System | Flat drive (full flat surface contact) |
| Material | Cold-forged, heat-treated chrome molybdenum alloy |
| Standards | DIN 3129, ISO 2572-2 |
| Origin | Made in Japan by Koken |
