Baldwin BF1258 Fuel/Water Separator Spin-On, 3 Micron Nominal/9 Micron Absolute, 3.69″ OD × 7.44″ L, 1‑14 Thread – 6Pack | Compatible with Case, Daewoo, Peterbilt, Cummins N14, Replaces FS1001, 33407

This 6‑pack of Baldwin BF1258 spin-on fuel/water separator filters protects heavy-duty diesel engines with high-efficiency filtration—3 micron nominal and 9 micron absolute—effectively removing water and microscopic debris. Each filter includes a steel housing (3.69″ OD, 7.44″ L), 1-14 thread, integrated standpipe, dual gasket system (ES24-D face seal and G381-A), and D-ring for leak-free installation. Compatible with FB1311 base and fit for Case, Daewoo, Peterbilt, and Cummins N14 systems. Sold as a convenient 6-pack for cost-effective maintenance. - Part Number: BF1258 - Quantity: 6 filters - Filter Type: Spin-On Fuel/Water Separator with Drain & Standpipe - Micron Rating: 3 µ nominal / 9 µ absolute - Outer Diameter: 3.69 in (93.7 mm) - Length: 7.44 in (188.9 mm) - Thread Size: 1-14 UN - Gaskets: ES24-D face seal and G381-A integral - Standpipe: Yes - D-Ring: Included - Housing: Steel, corrosion-resistant - Compatible With: Case; Daewoo; Peterbilt Trucks; Cummins N14 Plus Engines - Cross Reference: Replaces Fleetguard FS1001 - Country of Origin: USA

• Dual-Stage Filtration – Engineered with 3 µm nominal and 9 µm absolute media for optimal removal of water and fine particulates
• Heavy-Duty Construction – Durable steel canister (3.69″ OD × 7.44″/188.9 mm L) with pre-installed standpipe, Bosch ES24‑D & Baldwin G381‑A gaskets
• Standard 1‑14 Thread – Fits Baldwin FB1311 base and common heavy-duty fuel systems; includes D‑Ring for secure face seal
• OEM/Base Compatibility – Compatible with Case, Daewoo, Peterbilt trucks, and Cummins N14 Plus engines; replaces Fleetguard FS1001
• Bulk 6‑Pack Value – Ideal for fleets and service shops; ensures spare filters are always available at a lower per-unit cost