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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Height [mm] | 19 mm |
| Weight [kg] | 0.04 kg |
| Internal Thread Size | M16 x 1.5 |
| External Thread Size | M22 x 1.5 |
OE numbers (8)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—000 990 51 68
- MERCEDES-BENZ—001 990 73 68
- MERCEDES-BENZ—004 990 30 68
- DAF—0166 843
- DAF—166 843
- MERCEDES-BENZ—A000 990 51 68
- MERCEDES-BENZ—A001 990 73 68
- MERCEDES-BENZ—A004 990 30 68
Where this part fits
Original-fit position for OE A0009905168.
About this product
The FEBI BILSTEIN Union Nut (172508) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Height [mm]: Synthetic mm, Weight [kg]: 0, 04 kg, Material: Brass, Spanner Size: 27, Bolt Head-/Nut Design: Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 000 990 51 68, 001 990 73 68, 004 990 30 68, 01088 and 12 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FEBI BILSTEIN is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
About FEBI BILSTEIN
febi bilstein, founded in 1844 in Ennepetal, Germany, is one of the oldest and most comprehensive automotive parts suppliers in the independent aftermarket. febi bilstein offers over 40,000 parts spanning steering, suspension, engine, braking, cooling, and electrical systems. Certified to IATF 16949 and supplying OE-quality components, febi bilstein products undergo rigorous testing to match original equipment performance. With nearly 180 years of German engineering tradition, febi bilstein is the go-to brand for reliable, competitively priced replacement parts.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (8)
Union Nut FEBI BILSTEIN 172508 — compatible car models
| Manufacturer article number (MPN) | 172508 |
|---|---|
| OE part numbers | 000 990 51 68, 001 990 73 68, 004 990 30 68, 0166 843, 166 843, A000 990 51 68, A001 990 73 68, A004 990 30 68 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 172508 . Bolt Head-/Nut Design: 1. External Thread Size: M22 x 1,5. Height [mm]: 19 mm. Internal Thread Size: M16 x 1,5. Material: 10. Spanner Size: 27. Surface: 7. Weight [kg]: 0,04 kg
- 1x Union Nut
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Union Nut compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Union Nut fits. All fitment data is verified through TecDoc.
What specifications does this FEBI BILSTEIN Union Nut have?
This FEBI BILSTEIN Union Nut has the following specifications: Height [mm]: 19 mm; Weight [kg]: 0,04 kg; Material: 10; Spanner Size: 27; Bolt Head-/Nut Design: 1; Surface: 7. Check the full specifications table above for complete details.
What OE part numbers does this Union Nut replace?
This Union Nut replaces OE part numbers: 000 990 51 68, 001 990 73 68, 004 990 30 68, 0166 843, 166 843, A000 990 51 68, A001 990 73 68, A004 990 30 68. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Union Nut cost?
This FEBI BILSTEIN Union Nut is available for £3.99. Union Nut prices vary depending on brand, specifications, and vehicle compatibility. FEBI BILSTEIN parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Union Nut?
Regular inspection of your Union Nut is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Union Nut?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Union Nut fitted by a professional mechanic.
Can I use this part as a replacement for OE 000 990 51 68?
Yes, this FEBI BILSTEIN Union Nut is a direct replacement for OE part number 000 990 51 68. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
