I’m here to meet the demands of serious workshop professionals. Our 12 mm hexagonal keys are forged from high-grade alloy, heat treated for strength, and finished to resist wear in daily torque tasks. Each key is precision machined with chamfered edges for smooth insertion and a tight fit, and the tolerance is kept tight to minimize slip. I designed these keys for continuous production lines and demanding assembly work, so you can rely on consistent performance and longer service life. For Wholesale orders and Manufacturers, I offer bulk pricing, flexible packaging, and fast lead times. We can accommodate custom branding or tool configurations to suit your catalog. If you’re looking to streamline your supply chain, reduce downtime, and improve inventory control, tell me your required sizes, quantities, and delivery window, and I’ll tailor a competitive quote.
Global buyers seek reliability, and 12 mm hex keys are more than tools — they are critical for torque-critical assemblies. A hex key set made from a high-grade alloy, with precise heat treatment and protective finish, delivers a consistent fit and longer service life. This disciplined approach reduces downtime and prevents premature wear on sockets. Service backed by expertise means more than supplying parts. It involves design input, tuned tolerances, and performance testing under real-world conditions. It includes flexible packaging and traceable QC data for each batch, helping you qualify suppliers quickly. Global procurement demands stable supply, scalable quantities, and reliable logistics. A partner with strong process controls and proactive support outperforms rivals through shorter lead times and consistent quality. Choose a supplier that translates technical requirements into measurable value on the shop floor.
| Attribute | Specification | Value | Unit | Notes |
|---|---|---|---|---|
| Nominal size (Across flats) | Standard | 12 | mm | DIN 911 compatible metric hex key size |
| Material | Alloy steel | Chrome Vanadium (Cr-V) | - | Common for precision hex keys with good wear resistance |
| Finish | Surface treatment | Black oxide | - | Provides additional corrosion protection and aesthetic |
| Overall length (Long-arm variant) | Long-arm style | 200 | mm | Typical length for 12 mm size to reduce user effort |
| Hardness | Rockwell hardness | 52 | HRC | Range commonly observed: 50–55 HRC |
| Size tolerance | Manufacturing tolerance | ±0.05 | mm | Ensures proper fit with standard sockets/bolts |
| Maximum recommended torque | Torque guideline | 150 | N·m | Dependent on bolt grade and interface condition |
| Weight per piece | Product weight | 95 | g | Approximate for a single 12 mm key |
| Corrosion resistance (salt spray) | Test condition | 96 | hours | ISO 9227-like salt spray exposure with oxide finish |
| Fatigue life under cyclic torque | Durability test | 10,000 | cycles | At 60% max torque in standardized testing |