The best of both worlds, these Grade 2 titanium screws are lightweight like aluminum and more corrosion resistant than stainless steel. They stand up to salt water, strong acids, and harsh chemicals, so they're often used in chemical-processing and water-treatment facilities. Pan heads have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads. The Phillips drive easily aligns with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.

Length is measured from under the head.