- Home Page /
- Automotive /
- Automotive Replacement Parts /
- Caps /
- Fuel Tank Caps /
- 3 1/2 Nominal 8 TPI Non-Locking Aluminum Dies...
0 ratings
Item #:
20394692
3 1/2 Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap
Item #:
20394692
MMK 107088
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Only 7 items left in stock.
Order now and get it around Wednesday, September 02
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Durable Aluminum
Crafted from high-quality aluminum, this fuel cap ensures long-lasting durability and resistance against corrosion, making it ideal for prolonged use in diesel applications.
Precision Fit
With a 3 1/2” nominal size and 8 TPI threading, this fuel cap offers a precise fit for various equipment, preventing leaks and ensuring reliability during operation.
Non-Locking Design
The non-locking mechanism allows for quick and easy access to your fuel tank, making refueling efficient while reducing downtime in commercial and industrial settings.
Product Details
- Please measure the diameter of your current fuel cap or fuel tank fill tube prior to ordering.
- One 3 1/2” 8 TPI NPSL, non-locking, aluminum, diesel fuel cap.
- Female fitting, vented, for diesel application only.
- Includes rubber gasket seal, safety chain, and bail.
- Approximate dimensions = Across threads cap 3 7/16”, Across threads filler neck 3 1/2”
- *Replaces Freightliner A03-15682-6 and Western Star 43301-3403 *Fits select Kenworth, Freightliners after 1983 *Fits select Western Star after 1982 *Fits other select models of trucks
| Brand Name | Road King Truck Parts |
| Model Number | FCAP8-FLWS |
| Manufacturer Part Number | FCAP8-FLWS |
| OEM Equivalent Part Number | Freightliner®️#A03-15682-4 Western Star®️#43301-3401 |
| Manufacturer | Fasttech International Co., Ltd. |
| UPC | 850006757145 |
| Item Type Name | diesel fuel cap |
| Color | Silver |
| Exterior Finish | Aluminum |
| Style Name | Chain,Safety,Western |
| Item Dimensions | 4 x 4 x 1.75 inches (10.2 x 10.2 x 4.4 cm) |
| Item Weight | 11 ounces (311.85 grams) |
| Compatible with Vehicle Type | Truck |
| Automotive Fit Type | Vehicle Specific Fit |
| Closure Type | Twist-On |
| Material Type | Aluminum |
| Brand | Road King Truck Parts |
| Material | Aluminum |
| Item dimensions L x W x H | 4 x 4 x 1.75 inches (10.2 x 10.2 x 4.4 cm) |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
-
Commercial Vehicles
Ideal for delivery trucks and heavy machinery that frequently refuel with diesel, ensuring efficient operation.
-
Diesel Enthusiasts
Perfect for car enthusiasts who modify diesel vehicles, providing a reliable, vapor-retaining cap.
-
Rust-Prone Areas
Beneficial in areas with high humidity or salt exposure, as aluminum resists corrosion better than other materials.
-
Gasoline Users
Not suitable for gasoline vehicles, as the cap is specifically designed for diesel fuel applications.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What are the dimensions of the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap?
Answer: The cap features a nominal size of 3 12 inches with an 8 threads per inch (TPI) design. This specification ensures a secure fit on various fuel tanks, allowing for efficient sealing and reducing the risk of leaks. It's perfect for usage in diesel fuel systems where maintaining integrity and safety is crucial. Users will find this cap suitable for various diesel equipment, truck fuel tanks, and agricultural machinery. -
Question:
What materials is the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap made from?
Answer: This fuel cap is constructed from high-quality aluminum, which offers excellent resistance to corrosion and wear. Aluminum is lightweight yet durable, ensuring that the cap can withstand harsh environments typically found in industrial and automotive applications. This makes it an ideal choice for anyone looking to replace a worn or damaged fuel cap without the added weight of other materials. -
Question:
How does the non-locking feature affect usage?
Answer: The non-locking feature of this diesel fuel cap provides convenient access for frequent refueling. While some users may prefer locking mechanisms for added security, the non-locking design allows for a quick open and close when you need to refuel often. This is particularly useful in commercial settings where efficiency is essential, allowing operators to streamline their processes without delays. -
Question:
Is the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap compatible with all diesel tanks?
Answer: While designed to fit most diesel tanks that accept a cap with a 3 12 inch nominal size and 8 TPI threads, it's essential to verify compatibility with your specific model. Many trucks and heavy machinery use standard fittings, making this cap suitable for a broad range of applications. Always refer to your vehicle’s manual or consult with a professional to confirm that the cap meets your particular requirements. -
Question:
What are the advantages of using an aluminum fuel cap?
Answer: Using an aluminum fuel cap brings several advantages, including excellent resistance to rust and corrosion, lightweight construction, and durability in extreme conditions. These features ensure a long-lasting product that maintains a secure seal under varying temperature conditions. This cap is ideal for users who operate in difficult environments and require reliability for their diesel fuel systems, such as in trucking or agricultural sectors. -
Question:
Can the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap be used for other fuels?
Answer: This aluminum fuel cap is specifically designed for diesel fuel. While it may physically fit on tanks designed for gasoline or other liquids, we recommend against using it for anything other than diesel to ensure compatibility and safety. Diesel properties differ from other fuels, necessitating equipment designed to handle its characteristics effectively, making this cap an optimal choice for diesel applications. -
Question:
How do I install the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap?
Answer: Installation is simple—just align the threads of the fuel cap with those on the fuel tank and twist it clockwise until it’s firmly secured. Ensure that the surface is clean before installing to prevent any debris from causing leaks. This straightforward installation process means you can quickly and confidently replace your cap whenever necessary, keeping your fuel system secure. -
Question:
What should I do if the cap is damaged or worn?
Answer: If you notice any signs of damage or wear on your fuel cap, it's crucial to replace it promptly to avoid leaks or contamination. Regular inspections can help detect problems early. When you’re ready for a replacement, consider going for the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap, as it provides a reliable sealing solution to maintain your diesel system's integrity. -
Question:
Where can I buy the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap?
Answer: You can purchase the 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap from Ubuy. They offer a range of options and convenient purchasing methods tailored to your needs within Myanmar. -
Question:
What are some common applications for this diesel fuel cap?
Answer: The 3 12” Nominal 8 TPI Non-Locking Aluminum Diesel Fuel Cap is commonly used in trucks, agricultural machinery, and construction equipment that require diesel fuel. Its durable design and non-locking feature make it ideal for environments where refueling happens frequently, such as in fleet operations or in the agricultural sector where machinery is regularly used for long periods.
Road King Truck Parts Fuel Tank Caps FCAP8-FLWS Editorial Review
The replacement part for this product has received positive feedback from customers. It appears to be well-made and fits the item it is intended for. Customers can be reassured that they will likely have a good experience with the replacement part.
Customer Reviews & Ratings
28 customers ratings
-
5 Star
53%
-
4 Star
13%
-
3 Star
10%
-
2 Star
6%
-
1 Star
18%
Review this product
Share your thoughts with other customers
Pros
- The replacement part is of good quality
- It fits well
Cons
- Not enough information to determine if there are any cons
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
SJ
SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
MMK 107088
Order now and get it around Wednesday, September 02
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 7 items left in stock.
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.