http://www.junlyhardwaresupply.....com/fastener-parts/ Bolts and Screws suppliers Introduction Stainless steel carriage bolts, also known as stainless steel round head square neck bolts, have a short square section below the bolt head. The product is made of stainless steel, which has the characteristics of corrosion resistance and rust resistance, so it can be adapted to various outdoor humid environments. In addition, we can also make carriage bolts of other materials according to your actual needs. Since the head of the carriage bolt is round, there is no design of useful power tools such as cross grooves or hexagon