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Hagerty Employee

Wrenchin’ Wednesday: Free horsepower for your air tools

Air fittings are one of those things that you look at something on the shelf and wonder, “what’s the difference between the $1 and $10 part?” Often times, it’s just sticking to the general spec that you see on the box, like the 1/4-inch inner diameter of an air fitting. Most home air-compressors use 3/8-inch hose with 1/4-inch couplers, which are measured on their inner diameters. The male end of the quick disconnect coupler is what we’ll be working on today, though keep an eye out on how to spot a high-flow female coupler too ...


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