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Silver metal spin-on fuel filter cylinder with black sealing gasket visible on threaded end

Baldwin Filters

Baldwin Filters BF7940 Fuel Filter Spin-On 4 Micron

SKU CH-3Y8J-3K6R1

Spin-on fuel filter rated at 4 micron with integral post seal and attached gasket

  • 4 micron rating captures fine contaminants
  • Spin-on design enables quick filter changes
  • M20 x 1.50 thread fits compatible fuel systems
  • Includes G401 gasket for reliable sealing
  • 7 7/32 inch height matches OE dimensions

Baldwin BF7940 Fuel Filter for Diesel Engines

The Baldwin BF7940 is a spin-on fuel filter rated at 4 micron filtration for diesel fuel systems. It suits commercial vehicles, agricultural equipment and industrial engines that require fine contaminant removal. The filter uses a standard M20 x 1.50 thread for direct replacement.

Straightforward Spin-On Installation

Installation is a simple hand-tighten process on the existing filter head. The integral post seal and attached G401 gasket are designed to seal without tools or separate sealant. The most common issue is cross-threading the M20 x 1.50 thread or over-tightening, which can damage the seal surface.

Verify Thread and Clearance Before Ordering

Confirm the engine filter head uses an M20 x 1.50 thread pitch before purchase. Check that the 7 7/32 in height and 3 11/16 in diameter fit within your engine bay clearance. This filter is not suitable for gasoline applications or systems requiring a different micron rating or thread size.

How it compares

Measured against everything we stock in Pumps, Sprayers & Pump Accessories, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 69% of the 962 comparable items (median $38.99).

Specifications

Product
Brand nameBALDWIN FILTERS

Questions about this item

How can I verify the BF7940 fuel filter is working correctly after installation?

Check for fuel leaks at the M20-1.50 thread connection and monitor engine performance for smooth operation without fuel starvation symptoms.

What components come with the BF7940 and what must be purchased separately?

The filter includes the G401 attached gasket and integral post seal; no additional sealing parts are required for installation.

Which micron rating should I select for my fuel system needs?

This model provides a 4 micron rating designed to capture fine contaminants in diesel fuel systems.

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