Dimension Drawing
Unit : mm
| Part Number | M (Coarse) Nominal of Thread |
Pitch | L | D1 | L1 | B | L2 | Mass (g) |
CAD Download |
RFQ |
|---|---|---|---|---|---|---|---|---|---|---|
| SNST-M4-20-SD | M4 | 0.7 | 20 | 5.5 | 4 | 3 | Full Thread | 1.4 | CAD | RFQ |
● Batch cleanroom packing is provided for orders containing multiple items of the same size.
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Material/Finish
| SNST-SD | |
|---|---|
| Main Body | TW340 (Grade 2 Titanium) |
Application
Lighter-weight automobiles, aircrafts/aerospace equipment, robots, etc.FPD production equipment / Semiconductor manufacturing equipment / Electrical and electronic equipment / Offshore instruments / Plating facilities
Characteristics
- Hex socket head cap screws with small head diameter. Able to reduce the spot facing diameters compared to standard hex socket head cap screws.
- The specific gravity is approximately 60% that of stainless steel.
- Non-magnetic.
- Excellent chemical resistance / seawater resistance.
- For the properties of titanium materials, see "Properties of Titanium." ⇒Properties of Titanium
- 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.
Usage Example
It is possible to perform spot facing and hide the head in locations where spot facing is not possible with standard hex socket head cap screws.
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) |
|---|---|---|
| SNST-M3-SD | 4.5 | 5.03 |
| SNST-M4-SD | 5.5 | 8.78 |
| SNST-M5-SD | 7 | 14.2 |
| SNST-M6-SD | 8.5 | 20.1 |
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.
