Round Head Hex Socket Cap Allen Screw / Bolts Black Grade 10.9 Features: Material: High Tensile Grade 10.9 Steel Surface treatment：Black Oxide Grade：10.9 Screws Diameter : M5 Pitch：0.8mm（M5） Screws Length：16mm . 20 of Types: Metric The product is made of 10.9 grade high strength carbon steel, which has the characteristics of high toughness, good cold and hot working performance .
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