Most modern, high-quality screws come pre-lubricated from the factory, but why does that feature matter? Learn how lubricated screws can help optimize your project by easing installation and preventing damage.
When driving a screw, friction between the threads and the surrounding material creates resistance that the driver must overcome. Reducing that resistance with lubricant can make the fastener easier to install and reduce the torque required to drive it, which decreases the risk of damaging the workpiece.
Before you use non-lubricated screws in your project, consider the benefits of using pre-lubricated screws or applying additional lubrication to your fasteners.
Benefits of Lubricated Screws
Using pre-lubricated screws saves time that is otherwise spent applying additional lubricant, and lubricated screws provide the following additional benefits to a project:
The Best Lubricant for Your Screws
The appropriate lubricant depends on whether the fastener is going into wood, metal, or a threaded assembly. Most modern, high-quality screws come pre-lubricated from the factory with a specific coating optimized for the intended application. Pre-lubricated fasteners speed up intallation time by eliminating the need to manually lubricate every screw.
Paraffin Wax for Screws
Paraffin wax is a dry lubricant commonly used to reduce friction in wood screw connections. It's particularly useful for hardwood, long wood screws, and connections with high driving resistance.
Oil-Based Lubricants for Screws
Lubricants such as mineral oil and specialized screw lubricant blends help reduce friction, but they can also stain wood and finishes, so they're not recommended for exposed pieces where final appearance matters.
Not all oils can be used as screw lubricant—it's best to use a dedicated oil blend for screw installation.
Bar Soap for Screws
Bar soap can be used to lubricate interior, hard-to-drive screws. However, soap should not be used on outdoor fasteners or fasteners exposed to moisture, because the soap can attract water and accelerate moisture-driven corrosion. While soap can provide last-minute lubrication to screws in dry environments, it's not a universal solution for all applications.
Should You Always Lubricate Screws?
No. Lubrication can help aid installation, but it isn't necessary for every screw. In most general construction, using the right screw and following appropriate installation guidelines is more important than adding lubricant. Additionally, using pre-lubricated screws eliminates the need for additional manual lubrication before installation.
Lubricating screws is especially useful when:
- Driving screws into hardwood
- Installing long or large-diameter wood screws
- A screw is difficult to drive
- Preventing galling or seizing
Lubrication may not be appropriate when:
- The screw is already factory lubricated or has a ceramic coating
- Lubricant could interfere with a coating, seal, adhesive, or wood finish
- Installing self-drilling or specialty fasteners where lubrication could affect performance
Lubrication vs. Pre-Drilling
Why You Should Use Lubricated Screws
Lubricated screws face less friction and stress during installation than unlubricated screws, which makes them easier to drive and reduces the risk of split wood and broken workpieces. Screws that come pre-lubricated from the manufacturer, such as Jake Sales' ceramic coated and wax-coated construction screws, eliminate the need to manually lubricate every screw while easing installation and sometimes providing additional corrosion protection.
FAQ
What is the best lubricant for wood screws?
For most wood screws, beeswax, paraffin wax, or a dedicated screw lubricant are good choices. Wax lubricant is particularly useful for hardwoods and long screws.
Can you use soap to lubricate screws?
Dry bar soap can be used to reduce friction when installing wood screws; however, it is not recommended for exterior projects. If the screw will see moisture, use a dedicated screw wax or manufacturer-approved lubricant.
Should you lubricate stainless steel screws?
Anti-seize or thread lubricant can help prevent stainless steel fasteners from galling, especially in metal-to-metal connections. Always follow the fastener manufacturer's recommendations.
Do self-drilling screws need lubricant?
Generally, it's not recommended to add lubricant to self-drilling screws unless the manufacturer specifically recommends it, as lubricant may interfere with the screw's design.
Do pre-lubricated screws need additional lubricant?
Usually not. Screws that are factory-made with a lubricant or friction-reducing coating generally negate the need for additional lubrication.