Perko Fuel System Locking Cap f/ 1-1/2" Non-Vented Fills

The Perko Fuel System Locking Cap for 1-1/2" Non-Vented Fills is a marine-grade security solution designed to prevent unauthorized access and fuel theft on vessels and equipment. Built for owners who demand reliability in harsh saltwater and freshwater environments, this locking cap transforms a standard fuel fill opening into a tamper-resistant access point. Whether you operate a powerboat, sailboat, or industrial equipment, fuel security is critical to protecting your investment and maintaining operational peace of mind.

This cap features black plastic construction with an integrated gasket that seals tightly against moisture and contaminants while the built-in lock cylinder provides keyed access control. The Size #0 design fits Perko fuel fills 1313 and 1399, with an outside thread diameter of 1-15/32" for secure compatibility. The gasket serves dual purpose—preventing fuel vapors from escaping while keeping water and debris out of the tank. The locking mechanism is durable enough for repeated daily use without wear, making it suitable for commercial and recreational applications alike.

Marine operators, fleet managers, and equipment owners benefit most from this locking cap's straightforward installation on compatible Perko fill systems. The compact 3 x 2 x 6-inch footprint integrates seamlessly with existing fuel systems without modification. Installation requires no special tools—simply thread the cap onto your 1-1/2" non-vented fill opening and lock with the supplied key. For anyone storing a vessel or equipment in unsecured locations or high-theft areas, this Perko locking cap is an affordable, effective deterrent that protects fuel supplies and reduces insurance risk.