Brass threaded inserts www.tappexinserts.com have more efficient thermal conductivity which leads to faster heating and easier placement into plastic parts. Machining brass is easier than machining steel which also brings down the manufacturing costs. Stainless steel is a poor conductor of heat. This increases the temperature during machining and reduces the shelf life of the cutting tools being used. While it is true that there are certain operations, in which stainless steel is appropriate, brass inserts can also contribute equally while helping with cost reduction.