Metric Hexagonal Bolt Full Thread Yellow Zinc M20 * 2.5 * 50mm Grade 10.9

Choose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Dimensions meet ISO (formerly DIN) specifications. Length is measured from under the head.

Steel screws should be used in dry, noncorrosive environments. Match the thread spacing of mating components. Coarse threads are the industry standard: choose these screws if you don’t know the pitch.