Review on Vortex GC420K Black Fuel Cap by Leo Fairchild

As advertised, no problems. However, the finish of the lock was about 32 times less, so the cover had to be pulled all the way out to lock the lock. That said, unscrewing the cover required either a tool or some serious gripping strength. A very light anti-seize coating helped some, a bit of metal removal on the rounded corner of the lock eventually made a difference. I don't blame the seller, I put it down to a manufacturing tolerance. It also comes with an inner seal but not an outer one, I would suggest an outer o-ring as well.