Screws are not one-size-fits-all, and screw size can make a major difference in helping you fasten certain objects. One of the clearest examples of this is what happens when you use the wrong screw size for door hinges.
Screws that are too small can come out over time, while screws that are too large can interfere with the hinge function. When installing door hinges, you want to make sure you use the right screw head size and type and a screw long enough to keep things secure.
Even the screw size you use for door hinges can change depending on what type of door you’re installing. In this article, we explain what the most common screw sizes for door hinges are, how to measure existing screw size, and what else to consider.
Common Screw Sizes for Door Hinges
The demands of a hinge screw change with different types of doors, and the perfect screw looks different in each situation.
For example, interior doors do not need to hold up against weather like entry doors do, but they should be strong enough to withstand continued use as you move around your house.
While the general size remains similar, the small differences in size can make a world of difference. Most door hinge screws (apart from cabinet hinges) are 1.5 to 2.5 inches long, although some framing works just fine with screws as long as 3 inches.
Interior (Residential) Doors
Number 9 screws; 1.5 inches long
Your residential door hinges and doors see a lot of use, but they’re not made the same way as exterior doors. Most of your interior doors are hollow, and they won’t be able to handle a larger screw size as well.
Cabinet Doors
Number 6 screws; ⅝ inches long
Cabinet door hinges may seem like they’re always coming loose, but this issue usually occurs when you’re not using the right size screws. You need something long enough to hold the hinge tightly, but short enough it won’t run right through the cabinet door.
Exterior (Architectural) Doors
Number 10 screws; 2.5 inches long
An external door hinge with the wrong screw size may cause issues such as the door sagging and pulling out the top hinge. Long screws with a slightly larger diameter are most effective at keeping your home safe and secure.
Commercial Doors
Number 12 screws; 2.5 inches long
Commercial doors, such as those on offices or other commercial buildings, must be durable enough to hold up against public traffic. They should also be appropriate for the door and door frame material.
How to Measure Existing Screw Size
If you’re replacing existing screws, you need to measure the size of the top of the screw. This is the easiest way to find an exact replacement.
Use a measuring tape or a caliper to measure the width of the screw head, then match the size using this chart:
Screw Size | Fraction (in inches) |
#1 | 1/16” |
#2 | 5/64” |
#3 | 3/32” |
#4 | 7/64” |
#5 | ⅛” |
#6 | 9/64” |
#8 | 5/32” |
#9 | 11/64” |
#10 | 3/16” |
#11 | 16/64” |
#12 | 7/32” |
#13 | 15/64” |
#14 | ¼” |
#16 | 17/64” |
#18 | 19/64” |
#20 | 5/16” |
#24 | ⅜” |
You can also use a printed template, fold the image in half, and hold it up to the existing screw head to determine the correct size. This may be easier, but if the images are not to scale then you will end up with the wrong size.
Other Considerations with Screws for Door Hinges
Screw size is not the only thing to worry about when finding the right screw for your door hinges. You must also consider the finish or material of the screw as well as the most appropriate screw head style.
These details will affect the function and appearance of your door hinge almost as much as choosing the correct size and length of the screws.
Finish/ Material
Hinges come in different finishes and materials, and your screw should match this appearance for a cohesive image. Some examples include:
- Stainless steel
- Brass
- Satin nickel
- Zinc-plated
- Oil-rubbed bronze
The material type not only affects the appearance of the screw, but it plays a part in practical function. Some materials are better suited for heavy duty tasks, while others get the job done while staying on a budget.
Head Style
On top of choosing the right screw size, you need to choose a head style that matches your function.
Most screws used in door hinges have a flat head so they can sit flush with the material. This countersunk head design has no bulges that can be damaged or cause damage over time.
For hinges that don’t fold in on themselves, such as those that sit on the face of cabinet doors, a more decorative screw head is more appropriate. These do double duty as accessories that help accent your home.
Replacing Screws on Loose Door Hinges
Hinge screws loosen over time, especially when installed in weaker material. This video explains some simple and common ways to fix loose wood screws:
Drilling longer pilot holes and using longer screws is probably the cheapest and easiest fix, but it does little to fill in the space that has already deteriorated. If you have the time and resources, we recommend methods that fill the holes to best preserve the security of your doors.
Conclusion
You can use any screw size in your door hinge, but choosing the right size and type offers the most protection and function for a longer period. When choosing a screw for your door hinge, remember to:
- Opt for longer screws
- Ensure your screw head is the appropriate size for your hinge hole
- Consider protective features, such as material that fights corrosion
- Use flat-head screws for any overlay hinges (the most common in residential doors)
Are you replacing the screws on your door hinges? Let us know if you need help to find the right size or type for your space!