Dimension Drawing
Unit : mm
| Part Number | M (Coarse) Nominal of Thread |
Pitch | L | D1 | L1 | B | t | d | Mass (g) |
CAD Download |
RFQ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SVSHT-M4-8-SD | M4 | 0.7 | 8 | 6 | 1.5 | 2 | 2.5 | 1.5 | 0.44 | CAD | RFQ |
● Batch cleanroom packing is provided for orders containing multiple items of the same size.
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Material/Finish
| SVSHT-SD | |
|---|---|
| Main Body | TW340 (Grade 2 Titanium) |
Application
Vacuum devices / Vacuum chambers / FPD production equipment / Semiconductor manufacturing equipment / Electron microscopesCharacteristics
- Special low profile small head screws with ventilation holes.
- The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices.
- All head heights are 1.5 mm or less. For space-saving of equipment/devices and applications with limited overhead space.
- Because the head diameter is small, spot facing diameters can be reduced compared to standard hex socket head cap screws with ultra low heads.
- 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
Effective with vacuum devices and vacuum chambers that require the exhaustion of gas trapped in screw holes.
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) |
|---|---|---|
| SVSHT-M3-SD | 5 | 5.03 |
| SVSHT-M4-SD | 6 | 8.78 |
| SVSHT-M5-SD | 8 | 14.2 |
| SVSHT-M6-SD | 9 | 20.1 |
