Dimension Drawing
Unit : mm
| Part Number | M (Coarse) Nominal of Thread |
Pitch | L | D1 | L1 | B | d | Mass (g) |
CAD Download |
RFQ |
|---|---|---|---|---|---|---|---|---|---|---|
| SVST-M3-5-SD | M3 | 0.5 | 5 | 4.5 | 3 | 2.5 | 1.2 | 0.27 | CAD | RFQ |
● Batch cleanroom packing is provided for orders containing multiple items of the same size.
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Material/Finish
| SVST-SD | |
|---|---|
| Main Body | TW340 (Grade 2 Titanium) |
Application
Vacuum devices / Vacuum chambers / FPD production equipment / Semiconductor manufacturing equipment / Electron microscopesCharacteristics
- 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.
- The specific gravity is approximately 60% that of stainless steel.
- Non-magnetic.
- Excellent chemical resistance / seawater resistance.
- Special chemical polishing and brightening treatment improve the quality of the surface. Additionally, products have been cleanroom washed and packed. Cleanroom specification prevents oil and dirt from adhering.
- For the properties of titanium materials, see "Properties of Titanium."⇒Properties of Titanium
Usage Example
Gas trapped at the bottom of the screw hole is released through SVST-SD, and gas trapped in the drilled hole is released through SWAT-VF.SWAT-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) |
|---|---|---|
| SVST-M3-SD | 4.5 | 5.03 |
| SVST-M4-SD | 5.5 | 8.78 |
| SVST-M5-SD | 7 | 14.2 |
Mechanical Properties
| TW340 (Grade 2 Titanium) | |
|---|---|
| Tensile Strength (N/mm2) | 340-510 |
| 0.2% Proof Load (N/mm2) | 215 or Higher |
| Elongation (%) | 23 or Higher |
Values in chart are for reference only. They are not guaranteed values.
Physical Properties
| TW340 (Grade 2 Titanium) | |
|---|---|
| Specific Gravity | 4.51 |
| Melting Point (°C) | 1668 |
| Longitudinal Elastic Modulus (GPa) | 106 |
| Thermal Conductivity (W/(m・K)) | 17.16 |
| Linear Expansion Coefficient (K-1) | 8.4 × 10-6 |
| Electric Resistance (µΩ・m) | 0.55 |
| Magnetic Permeability (µ) | 1.0001 (Nonmagnetic) |
Values in chart are for reference only. They are not guaranteed values.
