10263

It's a direct-fit replacement part referenced under the Hydraulic Tech USA product line. To be 100% certain, double-check the supplier part number HDT10263 against the service documentation for your equipment.

Copper conforms when you torque it down, so it fills in the small imperfections between mating surfaces and creates a metal-to-metal seal. At ports and banjo fittings especially, that's how you stop fluid from weeping out under pressure. It's a compressible seal, meaning the material itself does the work rather than relying on a gasket or thread sealant.

Under clamp load, copper will deform a bit and conform to the mating surfaces, which is what helps it make a metal-to-metal seal at hydraulic connection points like ports and banjo fittings. It is intended for hydraulic systems where you need a compressible sealing washer to resist leaks in high-pressure service.