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API Spec 20FCorrosion Resistant Bolting for Use in the Petroleum and Natural Gas Industries, First Editionstandard by American Petroleum Institute, 06/01/2015
API Spec 20E Errata 2Errata 2 to Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, Second EditionAmendment by American Petroleum Institute, 05/01/2022
API Spec 20E Errata 2Errata 2 to Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, Second EditionAmendment by American Petroleum Institute, 05/01/2022
API Spec 20E Errata 1Errata 1 to Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, Second EditionAmendment by American Petroleum Institute, 11/04/2021
API Spec 20E ErrataErrata to Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, First EditionAmendment by American Petroleum Institute, 10/01/2014
API Spec 20C Addendum 1Closed Die Forgings for Use in the Petroleum and Natural Gas Industry, First EditionAmendment by American Petroleum Institute, 07/01/2014
API Spec 20CClosed Die Forgings for Use in the Petroleum and Natural Gas Industry, First Edition, Includes Addendum 1 (2014)standard by American Petroleum Institute, 10/01/2009
API Spec 20B ErrataErrata to Open Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry, First EditionAmendment by American Petroleum Institute, 12/01/2013
API Spec 20BOpen Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry, First Edition, Includes Errata (2013)standard by American Petroleum Institute, 04/01/2013
API Spec 20A Errata 1Errata to Carbon Steel, Alloy Steel, Stainless Steel, and Nickel Base Alloy Castings for Use in the Petroleum and Natural Gas Industry, First Edition, Includes Addendum 1 (2013), Addendum 2 (2015), Errata 1, August 2015Amendment by American Petroleum Institute, 08/01/2015
API Spec 20A Addendum 2Addendum 2 (includes Addendum 1) to Carbon Steel, Alloy Steel, Stainless Steel, and Nickel Base Alloy Castings for Use in the Petroleum and Natural Gas Industry, First EditionAmendment by American Petroleum Institute, 04/01/2015
API Spec 20A Addendum 1Addendum 1 to Carbon Steel, Alloy Steel, Stainless Steel, and Nickel Base Alloy Castings for Use in the Petroleum and Natural Gas Industry, First EditionAmendment by American Petroleum Institute, 10/01/2013