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 376F | Female 2" Std Thread

HEAVY DUTY: Manufactured to the highest standards and built to last a *************************************************************. 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.