Spare and Repair Parts for Cars and Equipment

Part numbers beat guesswork

Search by the number on the old part, then confirm make, model and year. A cross-reference number lets you match a part made by one company to the original, and a fit type tells you whether it is vehicle specific or universal. Universal parts need measuring: thread, diameter, length and connector. Photograph the old part before you remove it, and compare dimensions rather than appearance. Specialist areas include filter elements and cartridges.

Thread standards and connectors that look alike but do not mate

Many fittings in this group differ only by thread. A garden hose thread (GHT) is straight and a pipe thread (NPT) is tapered, so a 3/4 GHT end will not seal into a 3/4 NPT port, even when it starts to turn. Metric threads add a pitch figure, such as M8 x 1.25. Quick couplers come in profiles that do not interchange, so match both halves. Browse hose fittings and quick couplers for sizing details.

Questions about Spare and Repair Parts for Cars and Equipment

What is a cross-reference number?

It is the part number a maker lists for the original or competing part it replaces. It lets you find an equivalent from a different manufacturer, but always compare dimensions and connectors before relying on it.

Can I use a GHT adapter on an NPT port?

Only with a purpose-made adapter that has the correct thread at each end. Garden hose threads are straight and pipe threads are tapered with a different pitch, so forcing one into the other damages both.

How do I tell if a part is universal fit?

The listing says universal fit or non-application-specific, usually with dimensions instead of a vehicle list. Treat it as a part to measure and adapt, not as a bolt-on for your exact model.