VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
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Black Nylon Hardware Nuts Bolts Metric M8 Standard Hex Nut Din 934 Standard
Standard DIN 934 plastic hexagon nuts with black color , fire resistance class UL94V-2
Material
Hexagon Nut are made from plastic nylon with grade PA 66
Class for fire resistance
UL94V-2
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
| Thread diameter | M8 |
| Height h | 7.6 |
| Width F | 13 |
| Pitch | 1.25 |
| Width across corner G | 14.5 |
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 | M8 |
| Thread length | ±0.2 |
| Head height | ±0.1 |
| Head diameter | ±0.1 |
All sizes are in millimeter
Characteristics
Wear resistance
Plastic hexagon nuts have higher hardness 118 after improved chemical elements .
Good self-lubricant
Self lubricant make plastic hexagon nuts are more resistant wear and a longer service .
High mechanical property
Resistant high temperature
Normally , plastic hexagon nuts 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 hexagon nuts 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 hexagon nuts can be workable at -30℃
Environment friendly
Plastic hexagon nuts meet RoHS or REACH environmental production standard .
Application
Plastic hexagon nuts normally to be used with a threaded shaft or screws to secure objects , a vast application in many fields like :
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
| d | m | s | e |
| 1.6 | 1.3 | 3.2 | 3.41 |
| 2 | 1.6 | 4 | 4.32 |
| 2.5 | 2 | 5 | 5.45 |
| 3 | 2.4 | 5.5 | 6.01 |
| 4 | 3.2 | 7 | 7.66 |
| 5 | 4.7 | 8 | 8.79 |
| 6 | 5.2 | 10 | 11.05 |
| 8 | 6.8 | 13 | 14.38 |
| 10 | 8.4 | 16 | 17.77 |
| 12 | 10.8 | 18 | 20.03 |
| 16 | 14.8 | 24 | 26.75 |
| 20 | 8 | 30 | 32.95 |
Note : we accept customized sizes for plastic hexagon nuts .