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Ningbo PTFE Coating All Stud Bolts Thread Rod ASTM A193 Grade B7 B8 B16 DIN 976 Full Thread Threaded Rod Stud Bolts, Find Details and Price about Stud Bolt Threaded Rod from Ningbo PTFE Coating All Stud Bolts Thread Rod ASTM A193 Grade B7 B8 B16 DIN 976 Full Thread Threaded Rod Stud Bolts - Bester Industrial Technology Wuxi Co. Ltd