Tailored PREPERM® components for fast prototyping and smooth production

Solutions that fit your design – not vice versa

PREPERM® screws, nuts and washers

Extremely low losses, very low water absorption and good temperature resistance. Combining these properties with cost-efficiency makes PREPERM® screws, nuts and washers a very competitive alternative to PEI or PEEK.
Can be used in RF filters, RF combiners and antennas.

PREPERM® screws

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170519_1_Premix_7002-0

Dimensions

Thread
M
L
[mm]
D
[mm]
k
[mm]
t
[mm]
TORX
drive size
Recommended torsional torque [N*m]
PPE-M3x8-2-T10  M3  8  5.5  2  1  T10 0.15-0.2
PPE-M3x8-3-T10 M3 8 5.5 3 1.4 T10 0.15-0.2
PPE-M3x10-3-T10  M3  10  5.5  3  1.4  T10 0.15-0.2
PPE-M3x12-3-T10  M3  12  5.5  3  1.4  T10 0.15-0.2
PPE-M4x12-4-T10 M4 12 7.0 4 1.7 T10 0.3-0.4
PPE-M4x14-4-T10 M4 14 7.0 4 1.7 T10 0.3-0.4
Male thread tolerance range 6 g

Want to know where and how to use PREPERM® screws?

PREPERM® nuts

Nut-M3-transparent_400px

Dimensions

Thread
M
m [mm] s [mm] Recommended torsional torque [N·m]
PPE-M3x2.3-Nut M3 2.3 5.5 0.2
PPE-M4x3.0-Nut M4 3.0 7.0 0.3
Female thread tolerance range 6H

PREPERM® washers

flatwasher-transparent

Dimensions

d
[mm]
D
[mm]
T
[mm]
PPE-3x6x1.0-Washer  3.1  6.1  1.0
PPE-3x6x1.5-Washer 3.1 6.1 1.5
PPE-4x9x1.5-Washer 4.2 9.0 1.5

 

 

Packaging of PREPERM® screws, nuts and washers

PREPERM® screws, nuts and washers are packed in plastic bags of 1 000 pieces each.

 

Material properties of PREPERM® screws, nuts and washers

Unit Standard Value
Physical properties
Specific gravity g/cm3 1.2
Water absorption % ISO 62 (sat/23°C) 0.25
Dielectric properties @ 1GHZ
Dielectric constant, ɛr Impedance analyzer 3.1
Loss tangent, tan δ Impedance analyzer 0.0006
Thermal properties
Max. short-term temperature (0.45 MPa) °C ISO 75-2:2013 / Method B 175
Flammability (4 mm) UL94 V0
PREPERM is RoHS compliant unless otherwise specified.
The information represents typical values obtained by us and should not be regarded as a specification. We condition that the product will be inspected and qualified by the customer for his process to meet the specific requirements set by application, processing equipment and end product.

PREPERM® lenses

PREPERM® high frequency lenses can be customized to match your performance requirements and design.

Machined PREPERM® lenses enable rapid prototyping. You can quickly verify how well the material sample performs in your current product design.

Injection molding enables the quick and efficient mass-production of high-tolerance PREPERM® lenses. Also in complex 3D shapes.

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