Lock and latch spring
Compression springs for locks, latches and bolts. Design the exact return force and get an instant quote.
Recommended type and material
Locks use stainless 302 springs for corrosion resistance indoors and out. Consistent return ensures the latch reliably reaches the locked position.
Reference specification
| Type | Compression |
|---|---|
| Material | Stainless 302 |
| Wire diameter | 0.8 mm |
| Outer diameter | 6 mm |
| Length | 20 mm |
| Spring rate | 4.19 N/mm |
| Max safe load | 21 N |
| Solid height | 6.4 mm |
| Spring index | 6.5 |
Values calculated for the reference example; adjust everything in the designer.
Things to consider
- Stainless 302 resists moisture on external doors.
- Stable return force for smooth key action.
- Compact dimensions to fit the cylinder or latch.
Design your spring for this application
Open the example in the designer, adjust the dimensions and get an instant quote.
Design & quoteFrequently asked questions
Does it suit an external lock?
Yes — stainless 302 resists corrosion well on rain-exposed doors.
Can I replicate an existing spring?
Just measure wire diameter, outer diameter, length and coil count and reproduce it in the designer.