广东史特牢紧扣系统有限公司
Guangdong STL Fastening System Co., Ltd.
广东史特牢紧扣系统有限公司
DTI WASHER (ASTM F 959M - 2017 (a))
material Carbon Steel
grade, rigidity Grade 8.8 (HRC22~34)
Coating Mechanical Galvanized