Purge Port Screw for PVS-14, PVS-7, BNVD 1431 Night Vision Devices
Ensure the reliability, seal, and longevity of your night vision equipment.
This specialized purge screw is a critical component for the maintenance of professional-grade optics. It is designed to seal the maintenance port used for purging the device's internal housing with dry nitrogen or argon.
Why is Purging Essential?
Night Vision Devices (NVDs) must be filled with dry inert gas to displace oxygen and moisture. This prevents:
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Internal Fogging: Keeps lenses clear during rapid temperature fluctuations.
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Component Protection: Prevents oxidation of internal electronics and Image Intensifier Tube (IIT) contacts.
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Contamination Shielding: Blocks dust and microscopic particles from entering the optical path.
When used with a rubber O-ring, this screw creates a vacuum-tight seal that meets military standards for water resistance and environmental protection.
Key Features:
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Wide Compatibility: Fully compatible with industry-standard housings, including PVS-14, PVS-7, BNVD 1431, AN/PVS-31, and other systems utilizing an M3 thread pattern.
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Durable Construction: Manufactured from high-strength metal resistant to corrosion and wear during installation.
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Precision Fit: Engineered to match OEM dimensions, ensuring a flush fit that won't snag on gear or interfere with device operation.
Technical Specifications:
| Parameter | Value |
| Material | High-grade metal alloy |
| Thread Type | M3P |
| Dimensions (Length x Head Ø) | 8 x 5 mm |
| Weight | 5 g |
| Compatibility | PVS-14, PVS-7, BNVD 1431, Sentinel, and similar systems |
Tech Tip: Before installation, inspect your O-ring for cracks or debris. Do not overtighten, as excessive torque may damage the threads on polymer device housings.
