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Precision Micro Screws
Star recess anti-loosening screw in the precision range: a s
Hexalobular (Torx) Anti-Loosening Screw
- Installationstar bit in an electric driver
- StandardGB/T 3098.1, GB/T 197
- Typical substrateprecision electronics and robot joints
- Key inspectionsrecess dimensions, torque, thread gauging
- Drive TypeTorx T
- Head stylehex head
Product overviewOverview
Recesses come in a standard depth and in enhanced profiles (the IP series) with more vertical walls and greater effective engagement height. Small recesses round off first, and a star recess drives on flanks rather than on four inclined faces, so it survives more cycles than a cross recess at this size. On a short thread the patch covers proportionally less length, so prevailing torque scales with the patched length.
installed by star bit in an electric driver.
Key featuresFeatures
- Star recess resists recess wear on small sizes.
- Six-lobe face contact lowers stress concentration compared with a cross recess.
- Self-aligning recess suits robotic driving and high-cycle automated assembly.
- Standard or enhanced recess profiles available to match the required torque.
Typical applicationsApplications
- Automotive electronic control units
- Premium appliance control boards
- Smartphone and tablet internal frames
Selection notesSelection
On automated lines, monitor the torque curve — recess wear shows up as extra rotation before torque is reached.
Frequently asked questionsFAQ
Why prefer a star recess on small screws?
What matters during installation of the Hexalobular (Torx) Anti-Loosening Screw?
| Drive Type | Torx T |
|---|---|
| Standard | GB/T 3098.1, GB/T 197 |
| Head style | hex head |
| Drive | star recess |
| Installation | star bit in an electric driver |
| Typical substrate | precision electronics and robot joints |
| Key inspections | recess dimensions, torque, thread gauging |
Recess dimensions are checked with dedicated plug gauges and a profile projector, with depth held to drawing.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.
