High tensile flange bolts (DIN6921) Material: 30crmo, 35crmo, 40cr, 42crmo Size: M10-M20 Description of high tensile flange boltMaterial: 30crmo, 35crmo, 40cr, 42crmoFinished: Plain, BlackSize: M10-M20Packing: 20-25kgs/cartonYour OEM products are available!. High tensile flange bolt