Thumb Screw — Hand-Tightened (DIN 653 / DIN 464)
Thumb screws have a knurled or wing-shaped head designed to be tightened by hand without a tool. Used in temporary or frequently-removed connections — equipment guards, calibration adjustments, panel access, instrument mounting.
Specifications
| Standards | DIN 653 (low-profile knurled), DIN 464 (knurled with shoulder), DIN 466 (knurled high-form) |
|---|---|
| Material | Carbon steel, Stainless, Brass |
| Diameter | M3 – M10 |
| Surface Finish | Plain, Zinc plated, Brass, Stainless |
Frequently Asked Questions
How much torque can be applied by hand to a thumb screw?
For a typical 5-10 mm knurled head, hand torque is on the order of 0.3-1.5 Nm. This is suitable for light clamping but not for any structural connection. Specifically design the assembly so hand torque is sufficient — don't substitute thumb screws for properly torqued connections.
Need a quote on Thumb Screw?
Send us your specifications, target quantity, and destination port. We will respond within 24 hours with sourceable options and indicative pricing.
Get a Quote