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 Thread - 2CT

Beautifully engineered locking fuel cap and adapter. Manufactured to the highest standards and built to last a lifetime. Fits all 2” male or female tanks. Cap and adapter are made from high quality carbon steel, CNC machined for precise fit and function, case hardened for durability and resistance to drilling and damage. Once hardened the cap and adapters are silver zinc plated for corrosion resistance.resistace. The cap has 4 elongated slots machined on the shoulder to allow for a certain fit of the padlock (not included) with either one of the 12 5/16th’s holes provided in the adapter. The cap has been machined with 8 finger grooves to allow for a firm grip of the cap when tightening on to the adapter.There is a 10” stainless steel retaining chain attached to the inside of the cap to retain the cap to the tank during a fill up. The adapter inside diameter has been increased to allow for large fuel filler nozzles to fit for fast filling at truck stops. A gasket has been precisely fitted inside the cap to prevent vapor or fuel leakage. THIS CAP IS SEALED AND TO BE USED ONLY ON A FUEL TANK THAT HAS INDEPENDENT VENTING

• 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.