The Straight Brake Line fitting, a coupler plug, is a replacement fitting for most Martin Custom Products Master Cylinder and Brake Calipers.
These compression fittings utilize brass ferrules to clamp the brake line to the fitting. The fittings are used throughout the racing go-kart or racing lawnmowers as fittings for brake lines and routing throttle cable housing and linkages.
Fitting Specs
– Straight
– 1/8 MNPT
– 3/8″ Inlet
– 3/16 Brass Ferrule







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