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Baldwin BT251 spin-on oil filter, metal canister with threaded base and sealing gasket

Baldwin Filters

Baldwin Filters BT251 Oil Filter Spin-On Full-Flow 23 Micron

SKU CH-GXRB-ZQSRS

Full-flow spin-on oil filter with 23-micron rating, anti-drainback valve and 8 PSID bypass for reliable engine protection

  • Full-flow design keeps oil circulating continuously
  • 23 micron rating traps fine contaminants effectively
  • Spin-on construction allows quick tool-free replacement
  • Anti-drainback valve prevents dry starts after shutdown
  • 8 PSID bypass valve maintains flow if filter clogs

Baldwin BT251 Spin-On Oil Filter

The Baldwin BT251 is a full-flow spin-on oil filter designed for automotive and machinery lubrication systems. It fits applications requiring a 3/4-inch thread size and a 23-micron filtration rating. Mechanics and equipment operators use it to maintain clean oil circulation in compatible engines.

Installation notes and common issues

The spin-on design allows straightforward hand installation onto the existing filter mount. An anti-drainback valve and 8 PSID by-pass valve are integrated, so no separate components are required. Over-tightening can damage the gasket, while cross-threading the 3/4-inch thread is the most frequent error during fitting.

Critical specification: 23-micron full-flow rating

The 23-micron micron rating determines the particle size this filter captures under full-flow operation. Verify that the engine or hydraulic system specifies this exact rating; a finer or coarser filter will alter flow characteristics and protection levels. This specification alone confirms whether the BT251 matches the service requirement.

How it compares

Measured against everything we stock in Oils, Greases & Fluids, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 80% of the 337 comparable items (median $22.99).

Specifications

Product
Brand nameBALDWIN FILTERS

Questions about this item

How can I confirm the BT251 filter is working correctly after installation?

Check for oil leaks at the 3/4 inch thread and gasket, then verify the 8 PSID by-pass valve and anti-drainback valve maintain pressure during cold starts.

What comes with the BT251 filter and what must I purchase separately?

The spin-on filter includes the anti-drainback valve, 8 PSID by-pass valve, and I. gasket; purchase the correct grade and volume of engine oil separately.

Which micron rating should I select for the BT251 oil filter?

This model has a fixed 23 micron rating for full-flow lubrication; choose the BT251 when your application specifies this filtration level.

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