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What size socket for Ford Focus wheel nuts?

Most Ford Focus wheel lug nuts use a 13/16-inch hex across flats, which translates to about 20.6 mm. The closest standard metric size is typically 21 mm. However, exact size can vary by model year, trim, or aftermarket wheels, so verify on your specific car.


Common socket sizes used on Focus models


To help you shop for sockets, here are the sizes you’re most likely to encounter on Ford Focus lug nuts. Use the exact fit rather than guessing to avoid rounding the nut.



  • 13/16 inch (20.6 mm) across flats — the traditional imperial size for many Ford lug nuts.

  • 21 mm metric socket — the practical close-fit size used in most tool sets and service shops.

  • Note: Some trims or aftermarket wheels may require other sizes. If you’re unsure, measure the lug nut across flats or test-fit sockets to avoid damage.


In practice, many owners keep a 21 mm socket in their toolkit for Ford Focus lug nuts, since it covers the common imperial size while aligning with metric sizing. Still, verifying the exact size on your car is best.


How to confirm the exact size for your car


To avoid damage from using the wrong size, check one lug nut directly and compare sockets carefully.



  • Remove the wheel cover or center cap if present and inspect one lug nut across flats with a caliper or ruler.

  • Test-fit several sockets (start with 21 mm). If it fits snugly with no gaps or rounding, you’ve found the right size.

  • Check your owner’s manual or the wheel information placard in the door jamb for the recommended lug nut size and torque.

  • If you have aftermarket wheels or locking lug nuts, consult the wheel manufacturer or a Ford dealer for the exact socket and key required.


When in doubt, take your wheels to a shop or use a calibrated torque wrench to ensure you’re using the right size and that fasteners are torqued to specification.


Torque and safety considerations


Using the correct socket size is only part of the job. Proper torque ensures safety and longevity of the wheel studs and lug nuts.



  • Torque range: For most Ford Focus models, lug nuts are tightened to roughly 95–110 ft-lb (128–150 Nm). Always confirm with the owner’s manual or a dealership service bulletin for your exact year and wheel type.

  • Sequence: Tighten in a star pattern (criss-cross) to ensure even seating of the wheel against the hub.

  • Re-torque: After installation, re-torque after 50–100 miles (80–160 km) to account for settling.

  • Anti-seize: Do not apply anti-seize to the lug-nut threads unless specifically required by the manufacturer; typically not needed for lug studs.

  • Locking lug nuts: If your car uses locking nuts, ensure you have the correct key to remove and install them.


Following these guidelines helps prevent wheel loss and keeps the lug nuts properly secured.


Summary


In most Ford Focus models, a 13/16-inch (about 20.6 mm) lug nut across flats is used, with a practical close-fitting metric option of 21 mm. Always verify for your specific year and wheel type by measuring the lug nut or consulting the manual. Use the correct torque (typically around 95–110 ft-lb) and a proper star-pattern tightening sequence, and recheck after a short drive. If you have aftermarket wheels or locking nuts, obtain the correct size or key from the supplier or dealer. When in doubt, consult a professional to ensure a proper fit and safe installation.

What size socket for Ford wheel nuts?


The most common socket size for Ford lug nuts is 13/16" or 21mm, especially for models like the F-150 and Bronco. However, sizes can vary by model year and specific vehicle, with some models like the Bronco Sport using a 19mm (or 3/4") socket. It is best to confirm the exact size for your vehicle, as some older or different models might use a different size. 

  • 13/16" or 21mm: This is the most common size for many modern Ford vehicles, including the F-150 and Bronco. Some sources suggest 13/16" may be a slightly tighter fit than 21mm, which can help prevent rounding the lug nuts. 
  • 19mm (or 3/4"): This size is used on certain models, such as the Bronco Sport. 
  • Verification: It's important to check your vehicle's manual or confirm the size before buying tools, especially since some models use a different size or have swollen lug nuts that may require a special socket. 
  • Swollen lug nuts: If you have a Ford with swollen lug nuts, a standard socket may not fit. In these cases, a special "flip" socket, which has a slightly larger size, can be used to remove them. 



What size are the wheel nuts on a 2015 Ford Focus?


The lug nut size for a 2015 Ford Focus is M12 x 1.50, which means it has a 12mm diameter and a 1.5mm thread pitch. You will need a 19mm socket to remove and install these nuts, and the factory torque specification is 81 lb-ft (110 Nm).
 

  • Thread Size: M12 x 1.50
  • Socket Size: 19mm
  • Torque Spec: 81 lb-ft (110 Nm)



What size socket is a Ford lug nut?


The most common lug nut socket size of a 2021-2024 Ford Bronco lug nut is 13/16” (21mm).



What size socket are Ford Focus lug nuts?


M12x1. 5 Lug Nuts - Replacement for 2000-2018 Ford Focus, 2001-2023 Escape, 2006-2020 Fusion, 2006-2017 Jeep Compass, 2007-2017 Jeep Patriot Aftermarket Wheel, 3/4” Hex 20PCS Black Tire Nut.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.