VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
Add to Cart
Flat Head White Nylon Screw M6 Cross Recessed Plastic Fastener
Standard cross recessed flat head screws are made from plastic nylon with fire resistance class UL94V-2 , flat point design and full threads to secure working pieces .
Typical features
Low friction and good self-lubricant for a long service
Wide working temperature from -30℃ to 150℃ for the most areas with different climate .
Colorful choices for many demands
Assorted sizes with customized designs for your suitable requirements .
Material
Plastic cross recessed flat head screws are made from nylon PA 66 that with good performances .
Physical Performance
| Density ( g/cm3) | 1.14 |
| Water absorption % | 3 |
| Shrinkage % | 1～2 |
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 |
| HR hardness | 118 |
Electrical Performance
| Dielectric constant | 1.63 |
| Arc resistance sec | 130～140 |
| Specific volume resistance Ω·cm | 1.83×1015 |
| dissipation factor | 100～400 |
| Dielectric strength(kV/mm) | 20～30 |
Thermal Performance
| Normal working temperature ℃ | 80～120 |
| Brittle temperature ℃ | -30℃ |
| Melting temperature ℃ | 252 |
| Pyrogenic decomposition temperature ℃ | 350℃ |
| Matin heatproof ℃ | 50～60 |
Specification
Plastic cross recessed flat head screws are based on DIN 965 .
| Thread diameter | M6 |
| Thread length | 35 |
| Head height | 3.2 |
| Head diameter | 10.5 |
| Socket | PH 2 |
All sizes are in millimeter
Tolerances
General size tolerances are ±0.1 – 0.2 mm , and according to ISO 2768 for unmarked tolerances .
| Thread diameter D | M6 |
| Thread length L | 35 |
| Head height K | 3 |
| Head diameter dk | 11 |
All sizes are in millimeter
Characteristics
Wear resistance
Plastic cross recessed flat head screws has a higher hardness 118 after improved chemical elements .
Good self-lubricant
Self lubricant make plastic cross recessed flat head screws are more resistant wear and a longer service .
High mechanical property
Resistant high temperature
Normally , plastic cross recessed flat head screws can be operated smoothly at temperature 150℃ and thermal deformed temperature is up to 250℃ when parts with glass fiber .
Perfect elongation
Elongation at break is 2.2% according to ISO 527 testing method .
Corrosion resistance
Plastic cross recessed flat head screws can be resistant of the most chemicals on corrosion .
Good insulation
Specific volume resistance is 1.83×1015 and resistance to high breakdown voltage support part to be good insulated .
Resistant impact
60 – 80 KJ/M2 normally .
Resistant fire
Generally , the fire resistance is UL94V-2 and UL64V-0 for special parts .
Resistance to low temperature
Plastic cross recessed flat head screws can be workable at -30℃
Environment friendly
Plastic cross recessed flat head screws meet RoHS or REACH environmental production standard .
Application
Plastic cross recessed flat head screws are widely used to various fields that with light load and strict conditions on corrosion resistance and insulation as perfect features .
1 , Car industry
2 , Household appliances
3 , Official equipments
4 , Toy items
5 , Electrics
6 , Aerospace
7 , Sports equipments
8 , Technology and research device
More Specifications
Normally , plastic cross recessed flat head screw specification from M2.5 to M10 .
| D | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 |
| dk | 4.7 | 5.6 | 6.5 | 7.5 | 9.2 | 11 | 14.5 | 18 |
| K | 1.5 | 1.65 | 1.93 | 2.2 | 2.5 | 3 | 4 | 5 |
D : diameter
dk : head diameter
K : head height