![]() ![]() These filters are typically used by military and law enforcement personnel to protect against a variety of hazardous substances, including chemical gases and particulates. NATO 40mm filters are protective filters that are designed to be used with gas masks and respirators that have 40mm filter threads, but they are also designed to meet the performance requirements of the North Atlantic Treaty Organization (NATO), which is a military alliance of 30 countries from Europe and North America. Is there a difference between NATO 40mm and a standard 40mm Canister? The activated carbon in the filter works to adsorb (not absorb) harmful chemical gases and particulates from the air, making it safer to breathe. These filters are typically made of activated carbon, which is a form of carbon that has been treated to be highly porous and able to absorb chemical compounds. In general, 40mm gas mask filters are protective filters that are designed to be used with gas masks and refers to the standard size of the filter threading, which allows the filter to be used with any gas mask that has 40mm filter threads. One potential situation may be WW3 ( check out our guide to surviving WW3 here). If you’re looking to protect you and your family in an emergency situation, biological or chemical attack, or in a survivalist or prepping situation, then you will most likely be looking for a gas mask that takes NATO 40mm threaded filters. Today, we will be just focusing on the 40mm filters. Proprietary filter attachments include using a threaded, snap-in, or push-to-connect design. There are three main filter attachment types – 40mm, industry standard bayonet, and manufacturer’s proprietary filter attachments. You have different filter attachment types, different chemical filtering capabilities, and different filtration ratings. ![]() In the respiratory protection industry, it can be difficult to determine what type of filter to go with. ![]()
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