---
product_id: 441604626
title: "The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | For Transfer & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter | 1CT"
brand: "flow security systems"
price: "$282"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/441604626-the-flow-security-systems-versalock-vented-locking-fuel-tank-cap
store_origin: NZ
region: New Zealand
---

# Patented free-spinning anti-theft lock Built-in pressure & vacuum relief valves Weatherproof self-closing latch The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | For Transfer & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter | 1CT

**Brand:** flow security systems
**Price:** $282
**Availability:** ✅ In Stock

## Summary

> 🔒 Secure your fuel, secure your business — don’t let theft drain your profits!

## Quick Answers

- **What is this?** The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | For Transfer & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter | 1CT by flow security systems
- **How much does it cost?** $282 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/441604626-the-flow-security-systems-versalock-vented-locking-fuel-tank-cap)

## 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

- • **Keyed Your Way:** Choose keyed alike for convenience or keyed differently for maximum security.
- • **Pressure Perfect:** Integrated valves balance pressure and vacuum for safe tank operation.
- • **All-Weather Armor:** Weatherproof latch seals out dust, dirt, and moisture for lasting durability.
- • **Lock It & Forget It:** Patented free-spinning design makes theft attempts futile.
- • **Universal Fit & Ready:** Fits all standard 2" male threads with included adapter for versatile tank compatibility.

## Overview

The Flow Security Systems VersaLock FSS-754 is a heavy-duty, weatherproof locking fuel tank cap designed to prevent theft, tampering, and vandalism on transfer and above-ground commercial tanks. Featuring patented free-spinning technology, built-in pressure and vacuum relief valves, and versatile keying options, it fits standard 2" male threads and includes an adapter for broader compatibility. Manufactured in the USA from hard non-ferrous alloy, it offers reliable, long-lasting protection for your valuable fuel assets.

## Description

PREVENTS FUEL THEFT!The new designed FSS-754 VersaLock security cap is a quick and inexpensive way of safeguarding costly fuel and oil from theft, tampering and vandalism. It is designed for use on mobile fuel transfer tanks as well as above ground commercial gas and distillate tanks. The FSS-754 uses built in valves to equalize the pressure and vacuum. The FSS-754 is different from any other cap on the market today. It is designed with our patented "free-spinning" technology. When the cap is in the secure mode the cap will free spin making it virtually impossible to remove.KEY BENEFITS:Includes 2 KeysMade From Hard Non Ferrous AlloyWeatherproofPrevents TheftSaves MoneyFits all 2" standard male and female threads or can be used with a 750-200 adapter (not included) to convert to a 2" standard female thread. Quick Fill and BSP threads also available.Flow Security Systems manufacturing plant is located in Camarillo, California. It is a vertically oriented company with an in-house team of engineers, tool-makers, salesmen and marketing personnel. Flow Security Systems goal is to deliver excellent service and products based on years of dependable service and reliable product.Are you protecting your fuel, chemicals and water from theft? Purchase one of our locking devices today to help prevent unauthorized use, tampering and theft and keep your fuel costs down!

## Features

- PREVENT UNAUTHORIZED USE: The Flow Security Systems PRE-VENT Fuel Cap is a quick and inexpensive way to safeguard costly fuel and oil from theft, tampering, siphoning and vandalism. The VersaLock utilizes our patented free spinning design and is perfect for all business owners who want to secure their transfer fuel tanks.
- MULTIPLE USE: The FFS-754 is designed for use on mobile fuel transfer tanks as well as above ground commercial gas and distillate tanks. The VersaLock has a weather proof self-closing latch covering the face of the lock to prevent dust, dirt, debris and moisture from entering the lock.
- KEYED DIFFERENTLY OR THE SAME: The VersaLock can be keyed alike so that multiple fuel caps can be secured with the convenience of having only one key. Perfect for those who have multiple transfer tanks and don't have to carry different keys for each tank. The VersaLock can also be keyed differently so that each fuel cap can have its own unique key providing added security for your tank.
- BUILT IN VALVE: The FSS-754 uses built in valves to equalize the pressure and vacuum. The pressure vent valve allows the pressure relief valve to open at 1.5 Lbs and vacuum release to open at 1.5 Oz. This heavy duty lock is make from hard non ferrous alloy and fits standard 2 inch male thread.
- PATENTED DESIGN: The FSS-754 is different from any other cap on the market today. It is designed with our patented "free-spinning" technology. When the cap is in the secure mode the cap will free spin making it virtually impossible to remove.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Flow Security Systems |
| Colour | Silver zinc plating |
| Material | Hard non-ferrous alloy |
| Exterior Finish | Silver |
| Item dimensions L x W x H | 8.3 x 8.3 x 7 Centimeters |
| Style | Theft |
| Manufacturer | Flow Security Systems, Inc. |
| Country of Origin | USA |
| Item model number | FSS754+Adapter |
| Product Dimensions | 8.26 x 8.26 x 6.99 cm; 771 g |
| ASIN | B00JAO4ZEY |

## Product Details

- **Brand:** Flow Security Systems
- **Colour:** Silver zinc plating
- **Material:** Hard non-ferrous alloy
- **Exterior Finish:** Silver
- **Item dimensions L x W x H:** 8.3 x 8.3 x 7 Centimeters

## Images

![The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | For Transfer & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter | 1CT - Image 1](https://m.media-amazon.com/images/I/71HjNjylbxL.jpg)

## Available Options

This product comes in different **Pattern Name** options.

## Questions & Answers

**Q: Can i used for isuzu 2003 frr box truck?**
A: Measure the outlet to see if it's there same size

**Q: Is this product fit on a freightliner m2 straight truck??**
A: I don’t thinks so       This fits a 2inch NPT thread         However there is a locking cap for a freightliner tank       Measure to confirm

**Q: Work on a Transfer Flow auxiliary fuel tank ?**
A: We have a Transfer Flow auxiliary fuel tank and it fit great. Not sure if the tanks are the same size.

**Q: Will this cap fit a transfer flow tank ?**
A: We have ours on a transfer fuel tank, but because we have a pump it is not adequate venting and the sides of the tank suck in.   We take the cap off to pump.  If you have a gravity flow tank it may work just fine.

## Frequently Bought Together

- The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | for Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter
- Apeixoto 3/4 Inch Fuel Swivel, Fuel Hose Swivel with 3/4'' NPT Connector Fuel Plane Swivel with 360 Roating Connector
- Fill-Rite FR1210HA1 12V 15 GPM Fuel Transfer Pump w/Discharge Hose & Automatic Nozzle (Green)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/441604626-the-flow-security-systems-versalock-vented-locking-fuel-tank-cap](https://www.desertcart.nz/products/441604626-the-flow-security-systems-versalock-vented-locking-fuel-tank-cap)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-21*