MCGARD Car Parts

McGard: understand the range before choosing

McGard makes coded wheel locks operated through a matching key. The range here contains locking wheel bolts and locking wheel nuts in standard, black and higher-security descriptions. Those labels concern the lock design or finish; correct wheel retention still depends on the fastener matching the hub, wheel and original mounting geometry.

AutoMotoPart currently lists 57 McGard items. The largest McGard groups are 57 locking wheel fastener entries. McGard totals can change, so a category count is orientation rather than proof that a particular reference suits a vehicle, workplace or job. The exact McGard listing, its current technical information and the item in front of you must agree.

What the McGard page actually covers

Every current entry is a locking wheel fastener: thirty-seven are bolts and twenty are nuts. Most titles use Standard wording, with several Ultra High Security bolt sets and a smaller number of black or regular descriptions. Because many titles repeat the same broad name, the unseen dimensions and McGard number carry the useful distinction; the security label alone cannot establish fitment.

Build a reliable shortlist

Remove and inspect one original fastener from the exact wheel position before final selection, provided the vehicle is safely supported and the wheel remains secured. Record its thread, seat profile, loaded length and head clearance. If aftermarket wheels or spacers are fitted, identify their manufacturer specification rather than assuming the original vehicle fastener remains correct.

Do not identify a McGard set by chrome appearance or thread alone. Two fasteners with the same thread can have different radius, cone angle, seat diameter or shank length. If the new lock does not seat by hand exactly like the approved wheel fastener, stop; tightening force must not be used to reshape the wheel seat or prove compatibility.

Locking nuts, locking bolts and wheel construction

A locking nut threads onto a fixed wheel stud, while a locking bolt passes through the wheel and threads into the hub. The present McGard range includes both, and the distinction affects how thread engagement and protrusion are checked. A bolt that is too long can foul a brake or hub component; a nut with insufficient engagement cannot be rescued by tightening harder.

Inspect studs, hub threads, wheel holes and seats before fitting. Corrosion, crossed threads, stretched fasteners, cracked seats or previous impact damage require correction independently of the lock. Confirm that any centre cap or wheel cover can be refitted without pressing on the lock or leaving the key unable to engage fully.

Thread, seat and length are one specification

Thread design combines diameter and pitch. An M12 x 1.5 fastener is not interchangeable with M12 x 1.25, even though both start with M12. Seat form then controls how clamping load enters the wheel. McGard's official instructions distinguish cone, radius and shank styles, and its bolt guidance requires the new seat type and thread length to match the wheel application.

Measure length using the definition published for the exact lock; overall length and shank length are not the same. Thread engagement must meet the applicable McGard and vehicle requirements without projecting into moving parts. Rotate the hub or wheel by hand where instructed and investigate any contact immediately rather than shortening a lock or adding washers.

Key engagement and controlled tightening

The coded key transfers torque through a patterned interface. Clean grit from both patterns, seat the key fully and keep the wrench aligned with axial pressure so it does not tilt. Hand-start every lock for several turns before using a tool. Resistance at the start signals a thread or identification problem, not a need for greater leverage.

McGard's European instructions say to use the torque in the vehicle manual and not an impact spanner. An impact tool can over-tighten the lock and damage its key pattern. Tighten within the complete wheel-fastener sequence stated by the vehicle manufacturer, then recheck at the interval in the supplied McGard instructions. Do not add lubricant or anti-seize unless the applicable wheel-fastener procedure specifically requires it, because friction affects torque-to-clamp load.

Key codes, storage and roadside access

McGard sets use individual key codes rather than one universal adaptor. Keep the code card or installation information secure and record the route for ordering a matching replacement key. The key itself should remain accessible for tyre service or a roadside wheel change, but avoid leaving identifying paperwork loose where it can be separated from the vehicle record.

Retain the original wheel nuts or bolts in a labelled container because a temporary spare wheel may require different hardware. Before relying on that arrangement, check the vehicle handbook and spare-wheel fastener specification. Tell a workshop that locks are fitted and provide the key; uncontrolled removal attempts can damage the lock, wheel recess or stud.

Wheel changes and completion checks

Support the vehicle on stable ground using the approved jacking point, and never work beneath a vehicle held only by a jack. Clean contact faces as specified and locate the wheel squarely. McGard advises removing the lock first during a later wheel change and installing it last, which reduces load on the lock while the other fasteners secure the wheel.

After tightening, check that the key can be withdrawn cleanly and that every lock is seated flush in the intended way. Refit covers only after confirming clearance. Follow the vehicle and McGard instructions for torque recheck, and investigate vibration, clicking, changing torque or a wheel that will not rotate freely before driving. A security fastener must never compromise ordinary wheel retention or brake clearance.

From identification to a checked result

Keep the McGard part number, key code record and removed original fastener details with the vehicle documentation. After tyre or brake work, verify that the key has been returned before leaving the workshop and that the lock was tightened with the same controlled process as the remaining wheel fasteners.

Reading real McGard references

The McGard names below are examples from the current range and show why the complete description matters. They are not universal McGard recommendations and should not be treated as a fitment list. Within McGard, a shared family word can conceal a different dimension, connector, material, pack format, operating condition or installation side.

Repeated titles such as ‘Locking Wheel Nuts – Standard’ do not identify their thread or seat. Use the complete McGard number and current dimensional application record. Terms such as Standard, Ultra High Security or Black describe a range or finish, not permission to ignore wheel geometry.

Common errors around McGard products

• Selecting McGard locks by model year without checking aftermarket wheels or spacers.
• Confusing a locking wheel nut set with locking bolts for a threaded hub.
• Matching thread diameter but overlooking pitch or seat profile.
• Using a bolt with extra shank length that can contact components behind the hub.
• Starting the lock with a power tool instead of checking the thread by hand.
• Tilting or incompletely engaging the coded key while applying torque.
• Using an impact wrench through the McGard key.
• Losing the key code or failing to retain hardware needed for the spare wheel.

McGard questions and answers

Q: What does the McGard range here contain?

A: It contains thirty-seven locking wheel-bolt entries and twenty locking wheel-nut entries.

Q: How do I know whether I need nuts or bolts?

A: Inspect the hub: nuts fit fixed studs, while bolts pass through the wheel into threaded hub holes.

Q: Is M12 enough to identify the thread?

A: No. Pitch is also required, such as M12 x 1.25 or M12 x 1.5.

Q: Why does wheel-seat shape matter?

A: The seat transfers clamping load into the wheel, so cone, radius and flat or shank forms cannot be mixed.

Q: Can a longer locking bolt be made to fit with washers?

A: No. Obtain the correct seat and shank length; improvised washers alter clamping and clearance.

Q: How many McGard locks are fitted per wheel?

A: McGard's instructions specify one matching lock per wheel for these sets.

Q: Can an impact wrench tighten a McGard lock?

A: McGard says not to use an impact spanner on the lock key; hand-start and use a torque wrench.

Q: What torque should be used?

A: Use the wheel-fastener torque specified in the vehicle manual for the actual wheel configuration.

Q: Why must the key be held square?

A: Full straight engagement spreads torque through the intended pattern and reduces the risk of key or lock damage.

Q: What happens if the key is lost?

A: Use the individual code and McGard's official replacement-key route; do not assume another set's key will work.

Q: Will the original fasteners ever be needed again?

A: Keep them labelled because a spare wheel, wheel change or return to original hardware may require them.

Q: What should be checked after installation?

A: Confirm seating, torque, internal and cover clearance, free rotation where instructed, and the stated torque recheck.