M4 Phillips Drive Black Plastic Screws Countersunk Head Machine Screw
Plastic countersunk head machine screws , phillips drive socket ,standard machine full threads , flat point and 120° angle for countersunk head .
Material
Plastic Nylon PA66 with fire resistant grade UL94V-2
Specification
| Thread diameter | D | M4 |
| Thread length | L | 15 |
| Head height | K | 2.2 |
| Head diameter | dk | 8 |
| Drive | Standard | PH2 |
All sizes are in millimeter
Tolerance
Plastic countersunk head machine screws are referred to ISO , GB standards and ISO 2768 for unspecified tolerances
| Thread diameter | Standard |
| Thread length | ±0.5 |
| Head height | ±0.1 |
| Head diameter | ±0.1 |
| Drive | Standard |
All sizes are in millimeter
Electrical Performance
Plastic countersunk head machine screws with good insulation , electrical data as following :
Dielectric constant : 1.63
Arc resistance sec : 130～140
Specific volume resistance Ω·cm : 1.83×1015
Dissipation factor : 118
Physical Performance
Density ( g/cm3): 1.14
Water absorption % : 3
Shrinkage % : 1～2
Thermal Performance
Plastic countersunk head machine screws are used in wide temperature , they are resistant high temperature and low temperature .
Normal working temperature ℃ : 80～120
Brittle temperature ℃ : -30℃
Melting temperature ℃ : 252
Pyrogenic decomposition temperature ℃ : 350℃
Matin heatproof ℃ : 50～60
Mechanical Property
Plastic countersunk head machine screws with good mechanical property
Tensile strength MPa : 60～80
Elongation at break % : 2.2
Bending strength MPa : 100～120
Modulus of elasticity for bending MPa : 2000～3000
Notched Impact Strength(J/m) : 60～100
H hardness : 118
Features
1 , Wear resistance
2 , Good self-lubricant
3 , High mechanical property
4 , Resistant high temperature
Normally , plastic machine screws can be operated smoothly at temperature 150℃ and thermal deformed temperature is up to 250℃ when parts with glass fiber .
5 , Perfect elongation
Elongation at break is 2.2% according to ISO 527 testing method .
6 , Corrosion resistance
7 , Good insulation
Specific volume resistance is 1.83×1015 and resistance to high breakdown voltage support part to be good insulated .
8 , Resistant impact
60 – 80 KJ/M2 normally .
9 , Resistant fire
Generally , the fire resistance is UL94V-2 and UL64V-0 for special parts .
10 , Resistance to low temperature
Plastic machine screws can be workable at -30℃
11 , Environment friendly
Plastic machine screws meet RoHS or REACH environmental production standard .
Application
Plastic machine screws are widely used to various fields that with light load and strict conditions on corrosion resistance and insulation as perfect features .
1 , Chemical industry
2 , Car industry
3 , Household appliances
4 , Official equipments
5 , Aerospace
6 , Sports equipments
7 , Technology and research device
8 , Petro industry
9 , Vessel
Additional Colors
We can provide more colors except Black for plastic countersunk head machine screws ,
Popular colors as white ,green ,red ,yellow ,golden and beige .
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M4 Phillips Drive Black Plastic Screws Countersunk Head Machine Screw Images
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