Fuel Filter FF5971NN 120 x 292 mm M90 x 2 for Cummins X15 X12
Spin-on secondary fuel filter FF5971NN, 120.3 mm (4.74 in) outside diameter and 292.1 mm (11.5 in) overall height, M90 x 2-7H thread, 4 micron NanoNet media. Cross-references 5575143, BF46248 and DBF5811. Fits 2020 onward Cummins X15 and X12 with EPA 2017 or EPA 2021 ratings.
| Tier Pricing (USD / unit) | |
|---|---|
| Qty | Unit Price |
| 1+ units | $25.99 |
| 10+ units🎯 Recommended | $24.69 |
| 50+ units | $22.09 |
| 100+ units | $20.79 |
📋 Key Specs
| Part Number | FF5971NN, 5575143, BF46248, DBF5811, WF10891 |
| Filter Type | Spin-on secondary fuel filter |
| Outer Diameter | 120.3 mm (4.74 in) |
| Overall Height | 292.1 mm (11.5 in) |
| Thread | M90 x 2-7H |
| Micron Rating | 4 micron at 99.2% primary particle efficiency |
| Media | NanoNet synthetic media |
| Service Interval | 75,000 miles |
| Contents | 1 fuel filter |
| Notes | Stands 66 mm taller than the FF5776 it supersedes; check housing clearance |
| Application | 2020 onward Cummins X15 and X12; secondary filter position |
❓ FAQ
No. It is listed for 2020 and newer engines with EPA 2017 or EPA 2021 ratings. Earlier ISX15 and X12 use a different filter, so check the engine serial number first.
Because it is. It stands 66 mm taller than the FF5776 it replaces while keeping the same M90 x 2-7H mount, so confirm there is clearance under the hood before fitting.
Secondary, on the pressure side. The primary water separator is a separate part with its own drain, and it is serviced on water loading rather than on mileage.
For a line-haul truck it is roughly three times the interval of the earlier filter, so fewer changes per year. Severe duty or dirty fuel shortens it, and the interval is a ceiling rather than a promise.
M90 x 2-7H, metric form. It is the same mount as the filter it supersedes, so no adapter is needed, but the metric thread is not interchangeable with the smaller imperial heads.
MOQ varies by product: 5–100 units for standard parts (see product page). Tier pricing decreases with volume. Custom parts usually ≥ 50 units, evaluated by process.
Stock/short-run: 7–15 days; bulk orders 20–35 days; custom 30–45 days incl. sampling. Note your deadline in the inquiry — sales will confirm capacity.
Add products to the inquiry list and submit with contact info. Sales contact you within 24h and issue a formal quotation (tier pricing + proforma invoice) within 48h. The AI assistant can pre-fill inquiries in chat.
Yes. We develop from drawings/samples and support private labeling. Process: evaluation → sampling (15–25 days) → approval → mass production.
Payment: T/T 30% deposit + 70% before shipment / L/C / Trade Assurance. Shipping: FOB Ningbo/Shanghai, CIF or DDP; EU & NA warehouses; sea/air/express.
ISO 9001 & IATF 16949; CE/UL/ATEX on key products. Every batch ships with inspection reports; third-party inspection (SGS/BV) supported.
Description
Product Overview
FF5971NN is a spin-on secondary fuel filter 120.3 mm (4.74 in) across and 292.1 mm (11.5 in) tall, threaded M90 x 2-7H and rated 4 micron. It screws onto the secondary filter head on 2020 and newer Cummins X15 and X12 engines, on the high-pressure side of the fuel system where the finest grit has to be stopped.
