Semi Truck Locking Fuel Cap 3.5" Vented – Aluminum w/ 2 Keys (SNV431089)
Warranty Information
ROADWEST stands behind the parts we sell. Unless otherwise stated on the product page, your purchase is covered by a 1-Year Limited Warranty against manufacturing defects under normal use.
What’s covered
- Defects in materials or workmanship
- Premature failure caused by factory-related issues
What’s not covered
- Normal wear and tear, cosmetic aging, corrosion from environment/road salt
- Damage from improper installation, incorrect wiring, modifications, misuse, or accidents
- Labor costs (installation/removal), downtime, towing, or other indirect costs
How to file a claim
Contact us with:
- Order number
- Product name / SKU
- Clear photos or a short video showing the issue
If approved, ROADWEST will provide an appropriate resolution (replacement parts, replacement unit, or refund/credit).
Please do not send items back without return authorization.
For more details, see our Shipping Policy, Easy Return & Refund Policy, and Warranty pages.
Shipping & Returns
Most ROADWEST orders ship from our U.S. warehouses within 1–2 business days. Standard ground delivery in the contiguous United States is typically 1–3 business days, with freight service used for oversized or extra-heavy parts.
- Shipping area: United States only (no PO Boxes or international addresses).
- Processing time: In-stock items usually ship within 1–2 business days, Mon–Fri.
- Delivery: Standard ground or LTL freight depending on size and weight.
- Returns: Most unused items may be returned within 30 days of delivery, subject to inspection and our return guidelines.
- Costs: Original and return shipping are generally the customer’s responsibility, unless the issue is caused by ROADWEST (wrong item, damaged on arrival, etc.).
For full details, please review our Shipping Policy and Easy Return & Refund Policy before placing your order.
Protect your diesel fuel and reduce losses with the High Soar SNV431089 Locking Vented Diesel Fuel Caps. This 2-pack of heavy duty aluminum fuel caps is designed for semi trucks and offers a secure locking design with included keys to help prevent fuel theft and contamination.
Each cap features a 3 1/2" nominal size and 5 1/2 threads per inch, engineered for diesel fuel tank applications only. Compatible with a range of Peterbilt, Kenworth, Freightliner and Western Star models, these caps are a direct replacement for common OE and aftermarket part numbers including 572.1036 and SNV431089.
Built from premium aluminum with a durable rubber seal, the caps help maintain a tight seal on the tank to minimize fuel evaporation, leaks and contamination. Whether you are replacing worn or missing caps or upgrading to locking versions, this set is a practical upgrade for fleet and owner-operator trucks.
- Heavy-duty aluminum construction – Made from premium aluminum that is corrosion-resistant, wear-resistant and heat-resistant for long service life in demanding road and weather conditions.
- Locking design with keys – Each cap includes a secure locking mechanism and keys to help deter fuel theft and unauthorized access to your diesel tanks.
- Vented fuel caps – Vented design helps maintain proper tank pressure during fuel expansion and contraction, supporting stable fuel system performance.
- Precise fit dimensions – Designed with 3 1/2" nominal size and 5 1/2 threads per inch, suitable for diesel fuel applications only.
- Wide semi-truck compatibility – Compatible with many Kenworth (after 1984), Peterbilt (before 1980), Freightliner (before 1984) and Western Star (before 1983) models that use this style cap.
- OE replacement cross references – Replaces common part numbers 572.1036 and SNV431089 for easy identification when ordering.
- Improved sealing performance – Integrated rubber seal and sealing ring help reduce leaks and prevent dust, water and debris from entering the fuel tank.
Package Includes:
- 2 × Locking Vented Diesel Fuel Caps (SNV431089 style)
- 2 × Keys
| Brand | High Soar |
|---|---|
| Product Type | Locking Vented Diesel Fuel Caps (2-Pack) |
| Material | Aluminum |
| Exterior Finish | Aluminum |
| Color / Set | 2 × Fuel Caps with Keys |
| Nominal Size | 3 1/2" (Diesel fuel tank applications) |
| Thread Specification | 5 1/2 threads per inch |
| Design | Locking, vented, with rubber sealing ring |
| Vehicle Service Type | Semi-truck / heavy duty truck |
| Compatibility (Typical) | Kenworth (after 1984), Peterbilt (before 1980), Freightliner (before 1984), Western Star (before 1983) diesel fuel tanks* |
| Replaces Part Numbers | SNV431089, 572.1036 |
| Included Components | 2 × Fuel caps, 2 × Keys |
| Function | Secure and seal diesel fuel tanks, help prevent fuel theft and leaks |
| Fit Type | Direct replacement (verify dimensions and thread before purchase) |
*Always confirm compatibility by checking your original cap size, thread specification and part number before ordering.