This article was updated Jan. 17, 2023. It was originally published Oct. 21, 2004. Using the correct thread is critical for proper mating and replacing hydraulic fittings. First and foremost, it is a ...

Tapered thread pipe and JIC 37° flare fittings are the two most common types of fittings that generally rank poor for reusability Wouldn’t it be nice if leak-free connections could last forever? Nice, ...

Straight thread fittings use an O-ring or some other means of sealling where as mentioned pipe thread is tapered. Getting fittings to line up is easy. I see them most for hydraulic fittings (not ...