BTC Coupled N80-1 Casing 9-5/8 Inch
9-5/8 inch N80-1 casing with Buttress Threaded and Coupled (BTC) joints, nonalloy steel. Enhanced thread for torque. HTS 7306.29.10.
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If seamless BTC equivalent
Manufacturing seamlessness dictates 7304 classification.
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• BTC requires specific thread dope specs in safety data for hazmat compliance
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