---
product_id: 318047930
title: "FSS 376"
brand: "flow security systems"
price: "₩150044"
currency: KRW
in_stock: null
reviews_count: 8
url: https://www.desertcart.kr/products/318047930-fss-376
store_origin: KR
region: South Korea
---

# Heavy-duty locking security Precision CNC machined fit Corrosion-resistant zinc plating FSS 376

**Brand:** flow security systems
**Price:** ₩150044
**Availability:** ❌ Out of Stock

## Summary

> 🔐 Lock in your fuel’s safety — because every drop counts!

## Quick Answers

- **What is this?** FSS 376 by flow security systems
- **How much does it cost?** ₩150044 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/318047930-fss-376)

## Best For

- flow security systems enthusiasts

## Why This Product

- Trusted flow security systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fuel-Safe Design:** Integrated gasket and 10” stainless steel retaining chain prevent spillage and loss during refueling, combining safety with convenience.
- • **Unmatched Durability:** Crafted from case-hardened carbon steel to withstand drilling and damage for a lifetime of protection.
- • **Precision Engineering:** CNC machined for a flawless fit on all 2” male or female fuel tanks, ensuring seamless installation and operation.
- • **Padlock Ready Security:** Four elongated slots and 12 adapter holes allow customizable padlock placement (padlock not included) for enhanced theft prevention.
- • **Corrosion-Resistant Shield:** Silver zinc plating guards against rust and environmental wear, keeping your fuel secure and pristine.

## Overview

The Flow Security Systems Non-Vented Locking Fuel Tank Cap is a premium, heavy-duty security solution designed for commercial above-ground fuel tanks with independent venting. Made from case-hardened carbon steel and finished with corrosion-resistant silver zinc plating, it offers precision CNC machining for a perfect fit on all 2” male or female tanks. Featuring padlock compatibility, a spill-preventing gasket, and a stainless steel retaining chain, this cap ensures maximum theft protection and operational convenience for professional fleet managers and fuel custodians.

## Description

The Flow Security Systems Non-Vented Locking Fuel Tank Cap | Secures Transfer & Above Ground Commercial Fuel Tanks | Prevents Theft & Fuel Vandalism | FSS 376M | Male 2" Std Thead

## Features

- HEAVY DUTY: Manufactured to the highest standards and built to last a lifetime. Cap and adapter are made from high quality carbon steel, CNC machined for precise fit and function, and case hardened for durability and resistance to drilling and damage.
- COMPATIBILITY: This cap is sealed and can only to be used on fuel tanks that have independent venting.
- VERSATILE: Fits all 2” male or female fuel tanks.
- CORROSION RESISTANT: Once hardened the cap and adapters are silver zinc plated for corrosion resistance.
- PADLOCK: The cap has 4 elongated slots machined on the shoulder to allow for a padlock (NOT INCLUDED) to align with one of the 12 holes (5/16" diameter) in the adapter.
- RETAINING CHAIN: Attached to the inside of the cap is 10” stainless steel chain to retain the cap to the tank during a fill up. This is removable if a larger nozzle needs to be accomodated.
- INSTALLATION: The adapter is firmly connected to the tank via a wrench. It can be permanently set in place with use of a thread locker.
- PREVENTS SPILLAGE: Gasket with the cap provides a seal to prevent spillage of the tank contents.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Flow Security Systems |
| Color | Silver zinc plating |
| Material | Carbon Steel, Stainless Steel |
| Exterior Finish | Chrome |
| Item dimensions L x W x H | 3.25 x 4 x 3 inches |
| Vehicle Service Type | Truck |
| Style | Male 2" Std Thead |
| Item Weight | 1.6 Pounds |
| Automotive Fit Type | Universal Fit |
| OEM Part Number | FSS 376 |
| Manufacturer | Flow Security Systems, Inc. |
| UPC | 763416902770 |
| Item Weight | 1.6 pounds |
| Product Dimensions | 3.25 x 4 x 3 inches |
| Item model number | FSS 376 |
| Manufacturer Part Number | FSS376-M |
| Special Features | Durable and corrosion resistant. Prevent theft of valuable fuel and tank contents. |

## Product Details

- **Brand:** Flow Security Systems
- **Color:** Silver zinc plating
- **Material:** Carbon Steel, Stainless Steel
- **Exterior Finish:** Chrome
- **Item dimensions L x W x H:** 3.25 x 4 x 3 inches

## Images

![FSS 376 - Image 1](https://m.media-amazon.com/images/I/81fOSWHbhHL.jpg)
![FSS 376 - Image 2](https://m.media-amazon.com/images/I/81WHwGtPk+L.jpg)
![FSS 376 - Image 3](https://m.media-amazon.com/images/I/71DbMg2fWSL.jpg)
![FSS 376 - Image 4](https://m.media-amazon.com/images/I/71uNa1u3x7L.jpg)
![FSS 376 - Image 5](https://m.media-amazon.com/images/I/71RQVDMWsNL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: will this fit an rds 70326 fuel tank**
A: It will fit any tank with a standard 2” Npt male or female.

**Q: Can this be used on a vehicle?**
A: No ii is not recommended for use on vehicles. It is used for all type of stationary tanks and auxiliary/transfer tanks that have independent venting.

**Q: what is the measurement of the threads diameter? i need 1-7/8" (1.875)**
A: I'm not sure but I can tell you it fits my RDS fuel tank toolbox combo model #RDS-72367.

**Q: Is this unit available in 316 Stainless?**
A: Not currently, but there are plans in the works to make the cap and adapter from 316 Stainless Steel.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fit my needs for NPT to unvented cap
*by N***R on July 7, 2025*

Great cap

### ⭐⭐⭐⭐⭐ Great replacement for the one I have that Leaks.
*by O***1 on June 2, 2025*

Solidly built, have yet to put it to the test as I will have to fill my tank and see how it does with sloshing. Lock holes a bit small for average lock but not a deal breaker. As of right now, I would buy it again.

### ⭐⭐⭐⭐⭐ This is non vented and you have to vent yourself.
*by M***K on May 28, 2025*

Had a vented fill lid before. Put this one on and vented the tank where I wanted worked out very well.

## Frequently Bought Together

- The Flow Security Systems Non-Vented Locking Fuel Tank Cap | For Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Fuel Vandalism | Secures Fuel Tanks | FSS 376M | Male 2" Std Thead
- MAD HORNETS Fuel Check Valve Vent, 1/2" NPTF Male Threads, Fuel Gas Tank Rollover Safety Vent Valve Assembly, 5/16" Hose Threads Only Apply to NPTF
- DEWHEL 2 Inch NPT Female Thread Aluminum Weld On Pipe Fitting Bung

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**Shop now:** [https://www.desertcart.kr/products/318047930-fss-376](https://www.desertcart.kr/products/318047930-fss-376)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-21*