Lightweight Plastic Spacer Washers PC Plain Flat DIN 125 Washers
With good performances plastic flat washers are made from apparent PC (Polycarbonate) material , all burrs are removed and no sharp edge for easy installation .
Plastic PC flat washers are very good on elongation , they are not deformed even in heavy load pressure and perfect elastic resilience performance make plastic PC flat washers are used to
▲ Valve
▲ Car
▲ Sealing box
▲ Electrical components
▲ Electronics
▲ Medical device
Generally , plastic PC flat washers are used with bolt or screw or shaft assembled to increase friction and sealing purpose .
Material
Made from plastic PC (Polycarbonate)
Fire Proof Class
UL94V-0 standard
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 |
Electrical Performance
| Specific volume resistance Ω·cm |
1E + 18 |
| Heat conduction W/m.K |
0.13～0.2 |
| Dielectric constant |
3 |
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 |
Specification
| d1 |
20.5 |
±0.2 |
| d2 |
10 |
±0.2 |
| s |
2 |
±0.2 |
1 , All sizes are in millimeter
2 , Unspecified tolerances are referred to ISO 2768m .
Characteristics
1 , High resistant impact
2 , Perfect electrical performance
3 , Odorless with environment protection
4 , Low shrinkage
Generally , it is 0.1%~0.2%
5 , Stable dimensions
6 , High refractivity
Refractivity is 1.578 based on ISO 489 standard
7 , Good thermal stability
Plastic PC flat washers can work in -100℃ to 130℃
8 , Fine shininess
9 , Inhibiting bacterial
10 , Fire resistance
The grade for fire resistance is UL94V-0 without any additive
11 , Hard with good elongation
12 , Perfect apparent performance
Transparency is up to 90% .
13 , Good insulation
14 , Resistance to corrosion
Plastic PC flat washers are resistant to acid , salty , oil and alcohol .
15 , Wide working temperature
Plastic PC flat washers can be operated from -100℃ to 130℃ and brittle temperature below -100℃
In addition to metric sizes , we are available for BSW sizes and material cover PP , PA , ABS ,POM and rubber . Here are some BSW specifications for plastic PC flat washers .
| Normal |
d1 |
d2 |
s |
| #6 |
0.156 |
0.375 |
0.049 |
| #8 |
0.188 |
0.438 |
0.049 |
| #10 |
0.219 |
0.5 |
0.049 |
| #12 |
0.25 |
0.562 |
0.065 |
| 1/4 |
0.281 |
0.625 |
0.065 |
| 5/16 |
0.344 |
0.688 |
0.065 |
| 3/8 |
0.406 |
0.812 |
0.065 |
| 7/16 |
0.469 |
0.922 |
0.065 |
| 1/2 |
0.531 |
1.062 |
0.095 |
| 9/16 |
0.594 |
1.156 |
0.095 |
| 5/8 |
0.656 |
1.312 |
0.095 |
| 3/4 |
0.812 |
1.469 |
0.134 |
| 7/8 |
0.938 |
1.75 |
0.134 |
| 1 |
1.062 |
2 |
0.314 |
| 1-1/8 |
1.25 |
2.25 |
0.134 |
| 1-1/4 |
1.375 |
2.5 |
0.165 |
| 1-3/8 |
1.5 |
2.75 |
0.165 |
| 1-1/2 |
1.625 |
3 |
0.165 |
| 1-5/8 |
1.75 |
3.75 |
0.18 |
| 1-3/4 |
1.875 |
4 |
0.18 |
| 1-7/8 |
2 |
4.25 |
0.18 |
| 2 |
2.125 |
4.5 |
0.18 |
| 2-1/4 |
2.375 |
4.75 |
0.22 |
| 2-1/2 |
2.625 |
5 |
0.238 |
| 2-3/4 |
2.875 |
5.25 |
0.259 |
| 3 |
3.125 |
5.5 |
0.284 |
Note : pleas contact us for customized specifications for Plastic PC flat washers flat washers .
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