---
product_id: 588276577
title: "FSS 377"
brand: "flow security systems"
price: "1586 DH"
currency: MAD
in_stock: null
url: https://www.desertcart.ma/products/588276577-fss-377
store_origin: MA
region: Morocco
---

# Lifetime theft protection CNC machined precision fit Universal 2" male thread FSS 377

**Brand:** flow security systems
**Price:** 1586 DH
**Availability:** ❌ Out of Stock

## Summary

> 🔐 Secure your fuel, secure your peace of mind.

## Quick Answers

- **What is this?** FSS 377 by flow security systems
- **How much does it cost?** 1586 DH with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/588276577-fss-377)

## 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

- • **Unmatched Security:** Lock down your fuel with a hardened carbon steel cap that resists drilling and tampering.
- • **User-Friendly Design:** Ergonomic finger grooves and a stainless steel retaining chain make refueling hassle-free.
- • **Universal Compatibility:** Fits all 2" male threaded tanks—perfect for mobile and commercial fuel systems.
- • **Precision Engineered Fit:** CNC machined components ensure a seamless, leak-resistant seal every time.
- • **Pressure-Balanced Venting:** Built-in valve equalizes tank pressure to prevent vacuum lock and spills.

## Overview

The Flow Security Systems FSS-377 is a vented locking fuel tank cap crafted from case-hardened, zinc-plated carbon steel. Designed for universal 2" male threaded tanks, it features a built-in pressure vent valve, a leak-resistant gasket, and a stainless steel retaining chain. Engineered for durability and theft prevention, it’s the ultimate upgrade for commercial and mobile fuel tanks.

## Description

The Flow Security Systems Vented Locking Fuel Tank Cap | Secures Transfer & Above Ground Commercial Fuel Tanks | Prevents Theft & Fuel Vandalism | FSS 377M | Male 2" Std Thead

## Features

- PREVENT UNAUTHORIZED USE: The Flow Security Systems FSS-377 vented fuel cap is a quick and inexpensive way to safeguard costly fuel and oil from theft, tampering, siphoning and vandalism. The FSS-377 is perfect for anyone who want to secure their fuel tanks.
- MULTIPLE USES: The FSS-377 is designed for use on mobile fuel transfer tanks, as well as above ground commercial tanks.
- COMPATIBILITY: Fits all 2'' male threaded tanks. Cap is secured to adapter with any 5/16th diameter shackle padlock (not included).
- 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.
- 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.
- BUILT-IN VALVE: The FSS-377 uses a built-in valve to equalize pressure and vacuum. The valve allows the tank to vent when pressure reaches 1.5 psi and releases vacuum at 1.5 oz
- 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.
- SEALED SYSTEM: Inside gasket provides sealing and prevents spillage of the tank contents. May be susceptible to some spillage during the very brief venting time period.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Flow Security Systems |
| Color | Silver zinc plating |
| Material | Zinc plated carbon steel |
| Exterior Finish | Chrome |
| Item dimensions L x W x H | 3.25 x 4 x 3 inches |
| Vehicle Service Type | All Vehicle Types |
| Style | Male 2" Std Thead |
| Item Weight | 1.6 Pounds |
| Automotive Fit Type | Universal Fit |
| Manufacturer | Flow Security Systems, Inc. |
| Model | FSS-377 Vented Locking Fuel Tank Cap |
| Item Weight | 1.6 pounds |
| Product Dimensions | 3.25 x 4 x 3 inches |
| Item model number | FSS376-M |
| Manufacturer Part Number | FSS377-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:** Zinc plated carbon steel
- **Exterior Finish:** Chrome
- **Item dimensions L x W x H:** 3.25 x 4 x 3 inches

## Images

![FSS 377 - Image 1](https://m.media-amazon.com/images/I/71TMaBKQ-YL.jpg)
![FSS 377 - Image 2](https://m.media-amazon.com/images/I/71pNPuFFY8L.jpg)
![FSS 377 - Image 3](https://m.media-amazon.com/images/I/41y3nzIQNiL.jpg)
![FSS 377 - Image 4](https://m.media-amazon.com/images/I/41duL7tAq0L.jpg)
![FSS 377 - Image 5](https://m.media-amazon.com/images/I/51Lq4e-2NgL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.ma/products/588276577-fss-377](https://www.desertcart.ma/products/588276577-fss-377)

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-21*