MULTIPLE USE: Suitable for use on below ground and above ground oil heating storage tanks. Also for use on refrigerated trailer (reefer) tanks.  The FSS750 is a sealed cap and should only be used with a vented tank.  The FSS750 has fusible alloy built into the cap for 190F thermal relief.

KEYED DIFFERENTLY OR THE SAME: Tubular lock and key with over 50,000 combinations. Locks can be key alike for multiple use convenience.

HEAVY DUTY: Made from heavy duty corrosion resistant material for years of reliable use. Cap has a weather proof self closing latch covering the face of the lock to prevent dust,dirt,debris and moisture from entering the lock.

SAFTEY: Features a built-in fuseable alloy plug that melts in high temperatures, relieving pressure and reducing the risk of hazards in the event of a fire.

** Fits all 2″ standard male threads or can be used with a 750-200 adapter (included) to convert to a 2″ standard female thread. Quick Fill and BSP threads also available.