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High precision, smooth surface of the lock wire screw thread inserts Size 300series...
Surface shading thread insert have the function of free-running and screw-locking ins...
Coloring in the surface of stainless steel , mainly for the convenience of the operat...
API 5 1/2 J/K55 N80 casing coupling BC/LC oil pipe coupling clamp casing collar stan...
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2 3/8"-20" API 5CT tubing and casing Coupling and Connectors for oilfiled Api Casing...
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1.Standard: GB/T 20065-2006 ,ASTM A722 2.Material:40Si2MnV 3.Diameter: 15-75mm ...