Profile: PJK Machining & Mfg. Co., Inc. is a precision automatic screw machine shop. We specialize in machining many types of materials that include steel, brass, copper, nickel silver, aluminum and many plastics. We manufacture a wide assortment of special screws, nuts, rivets, bushings, studs and shafts. Our tool making department is equipped with vertical mill, surface grinder, lathes, cam cutter, gas and arc welders as well as optical comparators.