FK-381
| Overall length | 8,00 mm |
| Minimum centre spacing | 3,00 mm |
| Extension height | 5,72 mm |
| Spring force | 0,8 N |
| Maximum travel | 2,29 mm |
| Recomm. (rated) travel | 1,52 mm |
| Temperature range from | -55 °C |
| Temperature range to | 250 °C |
| Typical electrical resistance | 50 mOhm |
| Rated electrical current load | 3,0 A |
| Plunger | Cu-alloy, gold plated |
| Barrel | Nickel silver |
| Spring |