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Ningbo DIN938 DIN835 DIN940 DIN797 DIN6379 Custom Grade4.8 10.9 M24 PTFE Coated Stud Bolt Double End Side Studs Bolt, Find Details and Price about Ningbo Stud Bolts DIN938 Stud Bolt from Ningbo DIN938 DIN835 DIN940 DIN797 DIN6379 Custom Grade4.8 10.9 M24 PTFE Coated Stud Bolt Double End Side Studs Bolt - Bester Industrial Technology Wuxi Co. Ltd