(For SRX and SBX ring gaskets see note at bottom of this document).

Note: Ring gaskets marked SRX or SBX have identical measurements to RX and BX ring gaskets with the the same number designation, and they will fit the same corresponding connectors. API Spec 17D intends SRX gaskets to seal only 5000 psi segmented flanges, not listed above. The "S" indicates these gaskets have vent holes to allow reliable connector make-up underwater (subsea). API Spec 17D requires that manufacturers use only corrosion resistant alloy as the material for these gaskets.

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