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Stainless Steel Breather Vent Plug, 1/8, 1/4, 1/2, 3/8 NPT

4.5 out of 5 based on 2 reviews | Write a review

$11.90

Waterproof & dustproof stainless steel breather vent plug is equipped with 1/8, 1/4, 1/2, 3/8 NPT or G threads, commonly used in battery boxes of new energy vehicles and hybrid vehicles to achieve corrosion-resistant, waterproof and breathable functions.

Specification *

SKU: ATO-VP-BXG-30

This product has a minimum quantity of 5

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Delivery date: 6-12 days

Overview

Buy a 1/8, 1/4, 1/2, or 3/8 NPT breather vent plug online. It is made of 304 stainless steel, waterproof, dust-proof, oil-proof, and acid- and alkali-resistant. Protection level can reach IP67 or above (customized is supported). G thread vent plug is also available.

Specifications

Model: ATO-MS-BXG-30
Material: Stainless Steel 304
Temperature Resistance: -40℃ to 125℃
Moisture Permeability: >5000g/24H.M2
Hydrostatic Pressure Resistance: ≥100mbar for 30min
Protection Level: IP67
Features: Dustproof, Hydrophobic, Breathable, Heat Dissipation

Dimension (Unit: mm)

Stainless steel breather vent plug dimension

Details

Specifications	Air Permeability	Thread Length	Total Length	Thread Diameter	Wrench Diameter
G1/8	≥1500ml/min/@70mbar	8mm	16mm	18.5mm	17mm
G1/4	≥1500ml/min/@70mbar	7mm	15mm	18.5mm	17mm
G3/8	≥2300ml/min/@70mbar	10mm	19.5mm	24mm	22mm
G1/2	≥2300ml/min/@70mbar	10mm	19.5mm	24mm	22mm
G3/4	≥3000ml/min/@70mbar	10mm	23mm	35.5mm	32mm
1/8 NPT	≥1500ml/min/@70mbar	8mm	16mm	18.5mm	17mm
1/4 NPT	≥1500ml/min/@70mbar	7mm	15mm	18.5mm	17mm
3/8 NPT	≥2300ml/min/@70mbar	10mm	19.5mm	24mm	22mm
1/2 NPT	≥2300ml/min/@70mbar	10mm	19.5mm	24mm	22mm

Applications

ATO air vent plugs can be widely used in battery packs and battery boxes of base station equipment, new energy electric vehicles, hybrid vehicles, the solar energy industry, high-power energy storage equipment, and various outdoor electrical equipment products.

Vent plug applications

Tips: Why choose a waterproof vent plug?

Waterproof vent plug prevents water ingress, effectively blocking rain, splashes, and moisture to protect internal components from corrosion and damage.
Maintains ventilation, allowing air and gases to flow freely to prevent pressure buildup or vacuum inside the system.
It can keep out dust and contaminants, stopping dust, dirt, and particles from entering and extending equipment lifespan.
The waterproof breather vent plug is suitable for harsh environments, such as outdoor, marine, or high-humidity conditions, ensuring device safety and stability.

Existing reviews of Stainless Steel Breather Vent Plug, 1/8, 1/4, 1/2, 3/8 NPT

Waterproofing performance

What is the difference between ATO-VP-BXG-30 and ATO-MS-HT? Are both products completely waterproof? In other words, when used in a liquid-filled tank and venting is performed, will leaks occur if internal water splashes out?

From: Patley | Date: 22/05/2026

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ATO Responded

ATO-VP-BXG-30 (stainless steel) and ATO-MS-HT (brass) are the same type of product, just made of different materials. Their waterproofing principles and performance are exactly the same. They are designed to prevent external water from entering, not to prevent internal liquid from flowing out. Neither of these products is suitable for your coolant tank application.

Reliable vent plug for everyday protection

This stainless steel breather vent plug installs easily and seals tight. It stays waterproof and dust-proof in daily use, and the airflow keeps my equipment running cooler.

From: Brayden | Date: 02/12/2025

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