Home > Product > Cross-over subsCross-over subs
Cross-over subs are made from 4137H alloy steel.which are fully heat-treated to API specifications.Connections can be cold rolled after machining.if requested All connections are phos-coated or copper-coated to prevent galling during initial make-up.
Type A(Straight OD Subs):one crossoversub has one size(D)on O.D.
Type B(Reduced Section Subs):one crossover sub has two sizes(D1,D2)on O.D.
Type C(Left Hand Subs):the connection thread is left hand type.

Types of cross-over sub

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