External Locking Bolt

TPi locking bolts set the highest standards in the industry. Cold-forged locking bolts can achieve 12.9 Class in strength, are coated with 96 hours Triple Nickel Chrome finish and are 100% manually and visually tested. TPi locking bolts are conveniently packed in TPi clamshell with 4 locking bolts, 1 or 2 keys and 1 Key ID Cards. TPi produces several anti-theft wheel lock systems that fasten wheels, at the same time protecting them from theft. All wheel locks function like a regular lug bolt, but requires a special key tool for installation and removal.

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External Locking Bolt


More Even Torque
TPi External Locking Bolt is flattened on the side with tapered edge to provide more surface area for the torque distributed evenly.
Great Heat Dissipation
TPi External Locking Bolt provides more surface area, which dissipate the heat created by the revolution of the wheel while running.
Perfect Fit
Slightly tapered edges on top of the External Locking Bolt allow a smooth and tight fit for the bolt and socket.
Light weight
TPi External Locking Bolt is 4% lighter than the regular lug bolt.

Advanced Patented Design

When we decided to create the Round Bolt, we wanted it to maintain all the physical properties of our regular lug bolts, but with improved characteristics.

A Smartly Designed Key & Dual Hex Key

One key can be applied on both the locks and the regular tuner lug bolts, making it more user-friendly and convenient for customers to keep one key only.
Dual Hex Key is provided for greater application coverage, which matches the vehicle's original equipment lug wrench.

Well-Designed Bolt Cover Available

With Bolt Cover, it’s hard for thieves to identify that there is a lock on your wheel, which assures you peace of mind. Bolt Cover is developed to cover both the External Locking Bolts and the Round Bolts. The inside of the lock bolt cover has the pattern design, but on the outside it looks like a regular hex. When the bolt covers are placed on the fasteners, it’s hard to tell lock from bolt.

Quick Identification & TPI Logo Marked

Thread size is stamped on every lug nut for easy and quick identification for customers. Every Locking bolts is stamped with TPI Logo cap for the assurance of TPi quality.


Laser Hologram

Here are some features of hologram to identify TPi Genuine products.

Registration Card

A registration card is included in EVERY set for the customer to register the key code on our official website for a spare key if a key is lost. Key replacement is for FREE! The customers only needs to shows the registration card and pay for the freight (See the freight here) to get a FREE spare key.

Register Here!


With more than 40 years of experience, TPi has become the expert in forging wheel nuts. We are devoted to making products that meet the highest standard of safety and durability.
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