PREPERM® Screw
PREPERM® screws deliver ultra-low loss, extremely low moisture absorption, and excellent thermal resistance. Combined with cost-effectiveness, these properties make PREPERM® screws, nuts, and washers highly competitive against PEI-based counterparts.
Applications:
- Microwave/RF Filters: Precision fastening for signal integrity.
- RF Components: Low-loss dielectric fasteners in amplifiers and couplers.
- Microwave Communication Antennas: Reliable performance in high-frequency environments.
- Low-Loss Dielectric Fastening: Critical for systems requiring minimal signal degradation.
Represented Brands：Preperm
| Screw Dimensions | |||||||
| Thread | L | D | k | t | Torx Slot Size | Recommended Torque [N*m] | |
| M | [mm] | [mm] | [mm] | [mm] | |||
| 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 | 4 | 1.7 | T10 | 0.3-0.4 |
| PPE-M4x14-4-T10 | M4 | 14 | 7 | 4 | 1.7 | T10 | 0.3-0.4 |
| External Thread Tolerance Range 6 g | ||||
| Nut Dimensions | ||||
| Thread | m [mm] | s [mm] | Recommended Torque [N·m] | |
| M | ||||
| PPE-M3x2.3-Nut | M3 | 2.3 | 5.5 | 0.2 |
| PPE-M4x3.0-Nut | M4 | 3 | 7 | 0.3 |
| Internal Thread Tolerance Range 6H | |||
| Washer Dimensions | |||
| d | D | T | |
| [mm] | [mm] | [mm] | |
| PPE-3x6x1.0-Washer | 3.1 | 6.1 | 1 |
| PPE-3x6x1.5-Washer | 3.1 | 6.1 | 1.5 |
| PPE-4x9x1.5-Washer | 4.2 | 9 | 1.5 |
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