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SS304 SS316+SCM435 Ruspert Torx Drive Button Head Self Drilling Bi-Metal Screw With EPDM Washer, Find Details and Price about bi metal self drilling screw self drilling screws from SS304 SS316+SCM435 Ruspert Torx Drive Button Head Self Drilling Bi-Metal Screw With EPDM Washer - Suzhou Tsingri Fasteners Co., Ltd.