---
product_id: 69851999
title: "Locking Aluminum Vented Diesel Fuel Cap for 3 1/2\" Course Thread ASIN B074WDR7DQ"
brand: "road king truck parts"
price: "€ 44.85"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/69851999-locking-aluminum-vented-diesel-fuel-cap-for-3-1-2
store_origin: IE
region: Ireland
---

# Vented design 3.5" thread size Locking mechanism Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ

**Brand:** road king truck parts
**Price:** € 44.85
**Availability:** ✅ In Stock

## Summary

> 🚚 Fuel Your Journey with Confidence!

## Quick Answers

- **What is this?** Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ by road king truck parts
- **How much does it cost?** € 44.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/69851999-locking-aluminum-vented-diesel-fuel-cap-for-3-1-2)

## Best For

- road king truck parts enthusiasts

## Why This Product

- Trusted road king truck parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit:** 3.5" nominal size fits most truck filler necks—measure before purchase!
- • **Secure Your Fuel:** Locking mechanism ensures safety and prevents theft.
- • **Vented for Efficiency:** Designed to allow proper airflow, enhancing diesel performance.
- • **Durable Aluminum Build:** Crafted from high-quality aluminum for long-lasting use.
- • **Meets Safety Standards:** Complies with 49 CFR 393.67 for peace of mind on the road.

## Overview

The Road King Truck Parts Locking Aluminum Vented Diesel Fuel Cap is engineered for durability and security, featuring a 3.5" course thread design that fits most trucks. This vented cap enhances diesel performance while meeting stringent safety standards, making it an essential accessory for any truck owner. Supplied with two matching keys, it ensures your fuel stays safe and secure.

## Description

Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ

## Features

- PLEASE MEASURE FILLER NECK BEFORE PURCHASE! Female Fitting, Vented Locking, 3 1/2" Nominal Size, 5 1/2 Threads/Inch For diesel applications only
- Safety Chain and crossbar are standard Supplied with 2 matching keys (Keys not available separately)
- Meets 49 CFR 393.67 requirements for vehicles built after October 1985
- Across Threads - Filler Neck 3 1/2" Across Threads - Cap 3 7/16"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Road King Truck Parts |
| Material | Aluminum |
| Item dimensions L x W x H | 7.25 x 4 x 2.25 inches |
| Vehicle Service Type | Truck |
| Style | Modern |
| OEM Part Number | Freightliner®️ A03-12927-6, Tectran®️ 91-8106, Velvac®️ 600185-6, Western Star®️ K071-385-1234 |
| Manufacturer | Fasttech International Co., Ltd. |
| UPC | 750440733432 |
| Item Weight | 11.7 ounces |
| Product Dimensions | 7.25 x 4 x 2.25 inches |
| Country of Origin | China |
| Item model number | RK-LFCAP-FLWS |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | RK-LFCAP-FLWS |

## Product Details

- **Brand:** Road King Truck Parts
- **Material:** Aluminum
- **Item dimensions L x W x H:** 7.25 x 4 x 2.25 inches
- **Vehicle Service Type:** Truck
- **Style:** Modern

## Images

![Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ - Image 1](https://m.media-amazon.com/images/I/61Ljlm-IPFL.jpg)
![Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ - Image 2](https://m.media-amazon.com/images/I/71sdbuyEhKL.jpg)
![Locking Aluminum Vented Diesel Fuel Cap for 3 1/2" Course Thread ASIN B074WDR7DQ - Image 3](https://m.media-amazon.com/images/I/71j+uqULQSL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very nice
*by E***Z on June 3, 2021*

En otras reseñas mencionan que liquean pero la verdad es que no las he visto hacerlo.Cumplen su proposito como es de esperar, y me gustan.

### ⭐ I Do NOT recommend.
*by J***R on December 12, 2020*

Got my second pair of these fuel caps. Absolutely bad product. I would give 0 stars if possible. This set also leaks around the top of caps. Not where it screws on but up around the vents. So 4 caps so far and they all leak around the vents. So I will be returning all of them and getting my money back. I do appreciate how easy makes these returns. Thank you Amazon.

### ⭐⭐⭐⭐⭐ Work great!
*by G***. on April 21, 2022*

Arrived on time. Easy to install. Work great on my 2021 kenworth T680

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**Shop now:** [https://www.desertcart.ie/products/69851999-locking-aluminum-vented-diesel-fuel-cap-for-3-1-2](https://www.desertcart.ie/products/69851999-locking-aluminum-vented-diesel-fuel-cap-for-3-1-2)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-14*