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The Best China Forged Aluminum Billet Hub Centric Wheel Spacer, Twinake Industry, Twinake Wheel Spacer, Best Wheel Spacer from China
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https://www.asme.org/codes-standards/find-codes-standards/b16-52-forged-nonferrous-fittings-socket-welding-threaded
ASME B16.52 Covers ratings, dimensions, marking, and material requirements for titanium, titanium alloy, aluminum, and aluminum alloy forged fittings.
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