Dimension Drawing
Unit : mm
Characteristics
- Small head screws with ventilation holes. Because the head diameter is small, spot facing diameters can be reduced compared to standard hex socket head cap screws.
- The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices.
- Ventilation holes are machined using a method with minimal effect on metallic structures. Brittle fracture and outgassing during use in vacuum environments are prevented.
- Cleanroom wash/cleanroom packing provided.⇒Cleanroom Wash / Cleanroom Packing Service
Material/Finish
| SVSS-SD | |
|---|---|
| Main Body | SUSXM7 (Equivalent to SUS304) |
| Strength Class | A2 - 70 |
Related Services
Application
Vacuum devices / Vacuum chambers / FPD production equipment / Semiconductor manufacturing equipment / Electron microscopesUsage Example
Gas trapped at the bottom of the screw hole is released through SVSS-SD, and gas trapped in the drilled hole is released through SWAS-VF.SWAS-VF
Precautions for Use
- Since the head bearing surface area is small, the bearing surface pressure increases.
- Using the following formula as a reference, ensure that the bearing surface pressure due to screw tightening does not exceed the permitted surface pressure of the intended fastening material.
Head Diameter and Screw Effective Cross-Sectional Area
| Part Number | Head Diameter (mm) | Screw Effective Cross-Sectional Area (mm2) |
|---|---|---|
| SVSS-M2-SD | 3 | 2.07 |
| SVSS-M2.5-SD | 3.8 | 3.39 |
| SVSS-M3-SD | 4.5 | 5.03 |
| SVSS-M4-SD | 5.5 | 8.78 |
| SVSS-M5-SD | 7 | 14.2 |
| SVSS-M6-SD | 8.5 | 20.1 |
| SVSS-M8-SD | 11 | 36.6 |
| SVSS-M10-SD | 13.5 | 58 |
