PT Indoseiki Metalutama is a joint venture company between Indonesia, Taiwan, and Japan. Established in 1989, the company operates with technical assistance from ISK Co Ltd in Osaka, Japan. We produce a wide range of products, including engine stud bolts, special nuts, cold forging and forming parts, large-size fasteners, suspension fasteners, steering fasteners, and wheel bolts—providing strength and reliability for OEM and aftermarket customers.