Bosch 044 inlet fitting

Details
Options

Inlet adaptor fitting for Bosch 044 fuel pump, M18 x 1.5.

Bosch 044 Inlet Fitting

This high-flow inlet adaptor fitting is designed specifically for the Bosch 044 fuel pump, converting the factory M18 x 1.5 thread to a standard AN or hose connection. Upgrading your bosch 044 fuel pump fittings ensures a reliable, leak-free connection, allowing you to run larger feed lines for high-horsepower applications without restriction.

$14.00

Details

Frequently Asked Questions About Bosch 044 inlet fitting

What is the thread size for standard bosch 044 fuel pump fittings?

The standard bosch 044 fuel pump fittings use metric threads: the inlet port is M18 x 1.5 female, and the outlet port is M12 x 1.5 female. You will need adapters to convert these to AN or hose barb connections.

Do I need a crush washer for the inlet fitting?

Yes, because the Bosch 044 pump body uses a flat face for sealing, you must use a copper crush washer or a Dowty seal (bonded washer) between the pump and the adapter fitting to prevent leaks.

What size AN line should I use for the inlet?

For the inlet side, it is common to use -8AN or -10AN bosch 044 fuel pump fittings. A larger inlet line helps prevent cavitation and ensures the pump is fed with adequate volume, especially in high-horsepower setups.

Can I use this fitting on other Bosch pumps?

This specific M18 x 1.5 fitting is designed for the Bosch 044 (0 580 254 044) and similar pumps (like the Bosch 910 or 979). Always verify your pump's inlet thread size before purchasing.

Is the check valve located in the fitting?

No, the check valve on a Bosch 044 is typically screwed into the outlet side (M12 x 1.5). The inlet fitting is purely a high-flow adapter to connect your fuel tank or surge tank feed line to the pump.