api spec 5b working ring gauge 2 7/8 x 8tpi eue, api spec 5b working plug gauge 2 7/8 x 8tpi eue, api spec 5b working ring gauge 3 1/2 x 8tpi eue, ansi/asme b1.20. 1 ring gauge 2 x 11.5tpi npt, ansi/asme b1.20. 1 ring gauge 1 x 11.5tpi npt - l1 (rh)
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