This is an aftermarket (non-original) bolt, part number 9420414900NO, designed as a direct replacement for the Mitsubishi OEM part number 9420414900. It is compatible with a wide range of Mitsubishi engines, including models such as S3L, S4L, S3L2, S4L2, S4Q2, S3Q2, S4S, S6S, S4K, S6K, S4E, S6E, S4E2, S6E2, K4N, K3M, K4M, K3F, K4F, K3E, K4E, K3D, K4D, K2D, K2E, K3G, K4G, L3E, L2E, L2A, L3A, L3C, L2C, L3E2, L2E2, K4C, K3C, S4F, and S3F. The bolt features dimensions of approximately 20 mm in length, 10 mm in width, and 10 mm in height, with a weight of about 0.009 kg, matching the specifications of the original equipment part.