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M3 Black Plastic Screws Round Head Cross Drive For Electronics
General construction
Head : Round
Point : Flat
Drive : PH2
Thread : Full Fine
Pitch : 0.5
Material
Plastic round head micro screws are made from plastic PC (Polycarbonate ) apparent material with good fire resistance .
Plastic PC round head screws are a good choice for items that with high tensile strength and fireproof and light transmittance requests as individual performances .
Physical Performance
| Density ( g/cm3) | 1.2 |
| Water absorption % | 0.1～0.15 |
| Shrinkage % | 0.1～0.2 |
Mechanical Property
| Tensile strength MPa | 103 |
| Compressive strength at 20% tension kgf/mm2 | 80 |
| Elongation at break % | 3 |
| Bending strength MPa | 165 |
| Modulus of elasticity for bending MPa | 8270 |
| Notched Impact Strength MPa(kgf/mm) | 110 |
| Hardness HR | 90 |
| Modulus of elasticity for tension MPa | 2280 |
Thermal Performance
| Heat distortion temperature ℃ | 115～127 |
| coefficient of linear expansion k | 0.00007 |
| Normal working temperature ℃ | 110～130 |
| Brittle temperature ℃ | -100 |
| Melting temperature ℃ | 130 |
| Pyrogenic decomposition temperature ℃ | 350 |
Electrical Performance
| Specific volume resistance Ω·cm | 1E + 18 |
| Heat conduction W/m.K | 0.13～0.2 |
| Dielectric constant | 3 |
Class for Fire Resistance
UL94V-0
Environment Friendly Standard
RoHS and REACH
Specification
| Thread diameter | D | M3 |
| Thread length | L | 5 |
| Head height | H | 2.5 |
| Head diameter | dk | 6.0 |
| Drive | Standard | PH2 |
All sizes are in millimeter
Tolerance
Normal tolerances for plastic round head screws based on your requests and refer to ISO 2768 standard for unspecified tolerances .
| Thread diameter | M3 |
| Thread length | ±0.2 |
| Head height | ±0.1 |
| Head diameter | ±0.1 |
| Drive | PH2 |
All sizes are in millimeter
Features
High resistant impact
Perfect electrical performance
Odorless with environment protection
Low shrinkage
Generally , it is 0.1%~0.2%
Stable dimensions
High refractivity
Refractivity is 1.578 based on ISO 489 standard
Good thermal stability
Plastic PC round head screws can work in -100℃ to 130℃
Fine shininess
Inhibiting bacterial
Fire resistance
The grade for fire resistance is UL94V-0 without any additive
Hard with good elongation
Perfect apparent performance
Transparency is up to 90% .
Good insulation
Resistance to corrosion
Resistant to acid , salty , oil and alcohol .
Wide working temperature
Plastic PC round head screws can be operated from -100℃ to 130℃ and brittle temperature below -100℃
Applications
As outstanding performances , Plastic PC round head micro screws are widely used to various fields in industry especially for fields with high tensile strength and hard working conditions .
▲ Car industry
▲ Household appliances
▲ Official equipments
▲ High level toys
▲ Precise electrics
▲ Aerospace
▲ Petro industry
▲ Technology and research device
RFQs
What working temperature for plastic PC micro screws ?
Plastic PC micro screws are available for -100℃ to 130℃ .
Is there any use attention for PC micro screws ?
PC micro screws are not resistant Dilute alkalis , concentrated acid , methylene halide , dichloroethane and cresol .
If PC micro screws are used to where with much ultraviolet , should to be added ultraviolet absorbent .
Can you provide samples before place order ?
Yes , free charge for samples .
How many days for delivery ?
Normally , one week for standard specifications .
Can you make customized plastic screws ?
We can , and we are in this field over 10 years with much experiences .
