A lug bolt (also called a wheel bolt or hub bolt) is a forged-steel fastener that screws directly into the hub to hold the wheel. We are Fortune, a Ningbo lug bolts manufacturer with 20+ years of fastener production, supplying ball-seat, conical-seat and 6-spline anti-theft series in M12 and M14 threads, chrome or black . Every bolt is built under our ISO 9001 quality system. Send specs and we return a quote with OEM/ODM options the same working day.
We group our lug bolts by seat type — the interface that decides fitment — and show the three series side by side below. The FS6S 6-spline series adds anti-theft security, the FSBS ball-seat series fits European hubs, and the FSAS acorn-seat series covers US, Japanese and aftermarket wheels. All three use forged steel, M12 and M14 threads, 24–60 mm, in chrome or black, packed 20 pcs/bag, 10 bags/case. For the stud-and-nut system on the same vehicles, see our lug nuts range.
| Item | FS6S | FSBS | FSAS |
|---|---|---|---|
| Seat | 6-spline (anti-theft) | Ball 17 mm | Conical 17 mm |
| Market | anti-theft demand | European | US / JP / aftermarket |
| Thread | M12 / M14×1.25 / 1.5 | M12×1.5 / M14×1.5 | M12 / M14×1.25 / 1.5 |
| Length | 24–45 mm | 24–60 mm | 24–50 mm |
| Finish | chrome / black | ||
| Material | forged steel | ||
| Pack | 20 pcs/bag · 10 bags/case | ||
Fortune started manufacturing wheel hardware in Ningbo in 1996. Twenty-nine years on, the same plant produces wheel weights, tire valves and lug bolts on lines we run ourselves — experience you can hear in how quickly we answer a technical question.
Every batch is inspected before it leaves the floor — dimensional checks, thread-gauge verification, and lab testing on our own tensile tester, corrosion-test chamber and high/low-temperature test equipment. The inspection record ships with the goods, so your technical buyers see evidence, not adjectives.
We have been exporting for more than 15 years, so export documents, export packing and container loading are routine, not experiments. Your first shipment arrives with the paperwork your customs broker expects — and your repeat orders ship on the same discipline.
Our warehouse and office in North America shorten the last mile for distributors — local stock for fast movers and a team in your time zone. Combined with in-house forging and flexible OEM/ODM runs, that is what makes Fortune a stable partner behind your catalogue.
Our lug bolts — sometimes called wheel bolts or hub bolts — are made from forged steel at a high-tensile grade , the strength class specified for automotive wheel retention. Forging gives a dense grain structure that holds clamp load over time, unlike cut or weaker material. Material certificates and inspection reports ship with each order, so your technical buyers get documentation, not just a product.
Forging shapes the steel under pressure, aligning the grain flow with the bolt's contour so it resists cracking under clamp and impact load. Cut (machined-from-bar) bolts can leave weaker grain at the thread root; cast parts are not used in wheel retention. Forged steel is the automotive standard for a reason, and we forge in-house for full traceability.
We specify a high-tensile grade appropriate for automotive wheel retention. We do not publish a number we cannot back with a mill certificate, so ask us and we send the exact class together with the material certificate for your lot. That keeps your technical buyers compliant and your listings honest.
Each order ships with material certificates and inspection records — hardness, dimensional and thread-gauge results kept and archived for traceability. Your technical buyers see evidence, not adjectives, and your platform listings carry the documentation procurement teams expect.
We supply chrome (bright) and black (matte) lug bolts as standard, with custom colours and colour-matched caps available for brand programs. Every finish is engineered for corrosion resistance in road-salt and coastal markets, so the bolt looks right and stays serviceable for years. For the matching nut finish, see our lug nuts range.
Chrome gives the bright, polished look buyers expect on display wheels and factory-style builds. It is the default finish for most European and Japanese passenger-car programs where the bolt head stays visible, and it pairs with our ball and conical seats for a clean, uniform face.
Black (matte) finish is the fastest-moving combination for tuning brands and stealth builds, hiding the hardware so the wheel design leads. It ships in the same M12/M14 threads and seat options, so adding a black line costs you no extra fitment complexity.
Metric threads dominate this category and the pitch must match the hub exactly. We stock M12×1.25, M12×1.5, M14×1.25 and M14×1.5 in both chrome and black. One purchase order can cover European, American and Japanese fitments — the thread pitch itself is measured in millimetres between adjacent threads, so always confirm it before ordering. Our Lug Bolts Explained section below shows how to measure it.
| Thread | Common Seat | Length Range | Finish |
|---|---|---|---|
| M12×1.25 | ball / conical | 24–45 mm | chrome / black |
| M12×1.5 | ball / conical | 24–60 mm | chrome / black |
| M14×1.5 | ball / conical | 24–60 mm | chrome / black |
| M14×1.25 | conical | 24–50 mm | chrome / black |
Thread pitch is the distance between adjacent thread crests in millimetres — M12×1.5 means a 12 mm diameter with 1.5 mm between threads. Measure it with a thread gauge or count threads over a known length; a 1.25 and a 1.5 pitch look similar but will not seat, so never guess. Send us a photo of the old bolt and we confirm it for you.
A wheel bolt should engage enough thread to reach rated clamp load without bottoming out. As a rule of thumb aim for thread engagement of at least the bolt diameter (e.g. ≥12 mm for M12); too shallow strips under torque, too long can hit the hub. We confirm safe length against your hub drawing or sample before production.
The seat is the load-bearing surface that centres the wheel, so match it exactly — never by looks alone. Our FSBS ball-seat, FSAS conical (acorn) seat and FS6S 6-spline series cover all three common interfaces, letting you consolidate sourcing with one supplier. Getting the seat wrong is the single most common fitment failure we see. See the comparison table above for the quick view.
A ball (spherical) seat is the European standard; FSBS fits VW, Audi, BMW and Mercedes with a 17 mm ball radius in M12×1.5 / M14×1.5. Build depth here first if your customer base is largely European.
A conical (acorn, tapered) seat fits American, Japanese and most aftermarket alloy wheels, making FSAS the highest-volume series in most catalogues. Black finish with custom packaging moves fastest for tuning brands.
Where wheel theft is a real cost, six-spline FS6S turns a standard bolt into a low-profile lock without bulky hardware. It is a higher-margin add-on line that sells alongside the bolts your customer already buys.
Definition: a lug bolt (also known as a wheel bolt or hub bolt) is a threaded fastener that passes through the wheel and screws into the hub flange, clamping the wheel to the vehicle. A lug nut, by contrast, threads onto a stud that is pressed into the hub. Neither is ‘better’ — they are not interchangeable, and confusing them is the most common fitment error. All our bolts are forged steel, made under our ISO 9001 system.
A Lug Bolt is a threaded fastener that passes through the wheel and screws into the axle flange, holding the wheel to the hub. Correct seating keeps the wheel secure under braking and cornering loads — the interface your whole fitment depends on.
The difference is where the thread lives: a bolt screws into the hub, a nut onto a stud. Same job, different fitment — and the vehicle’s hub design decides which you need. See our lug nuts range for the stud-and-nut system and its seat options.
Rather than a stale model list, we map seat types to regional markets so you stock what actually sells. Ball-seat FSBS leads in Europe; acorn-seat FSAS covers US, Japanese and tuning; 6-spline FS6S serves anti-theft alloy wheels. Tell us your market and we align seat, thread and length, confirming fitment against your sample.
A clear installation procedure protects the wheel, the driver and your brand. Always work on level ground with the vehicle safely supported before removing any bolt. Follow a star pattern, torque to the manufacturer’s published value with a calibrated wrench, and re-check after 50–100 km. (Torque values vary by vehicle — always confirm against the OEM specification, not a generic chart.) The steps below follow the same sequence our own fitment guide uses.
Before you start: work on a flat, level surface and never rely on a jack alone — use jack stands rated for the vehicle's weight. You need a calibrated torque wrench, the correct socket for your seat type (plus the 6-spline key for FS6S), a lug bolt socket or breaker bar, and wheel chocks. Chock the wheels that stay on the ground and loosen bolts only with the vehicle supported.
Torque in a star (criss-cross) pattern so the wheel seats evenly and the clamp load stays balanced. Use a calibrated torque wrench set to the manufacturer's published value for your exact model — never a generic chart. Correct torque keeps our forged steel bolts at rated clamp load for the life of the joint; under-torque lets the wheel move, over-torque can stretch the bolt.
Inspect bolts at every tyre rotation: look for rounded or galled seats, thread damage, corrosion that has eaten into the surface, or any bolt that no longer torques cleanly. Replace the full set (not just the damaged one) if a seat is deformed or threads are stripped — a mixed set hides the weak link. Our per-batch inspection records help you track lot life in the field.
Our Ningbo plant runs OEM and ODM programs for brands in Europe, North America, the Middle East and Asia. Forging is done in-house, so we handle custom thread and length combinations with TÜV-listed processes and full traceability. Custom packaging and complete private-label programs are standard, from branded bags to colour-matched caps, so your brand looks consistent end to end.
We are audited under ISO 9001, with documented production and per-batch inspection. Hardness, dimensional and thread-gauge records are kept for every lot and archived for traceability — exactly what your platform listings and technical buyers ask for.
Bespoke threads, lengths and seat geometries are built to your drawing or sample, with no tooling surprises. Private-label bags, cartons and inserts are available, with artwork held on file for repeat orders and custom colours extending your brand program.
Acorn lug nuts that are not tightened to the correct torque can cause a wheel to come loose at highway speed — one of the most dangerous failures a driver can experience. Too loose, and the wheel works free over the first 100 km; too tight, and the studs stretch
Lug nuts with incorrect torque can cause a wheel to come loose at highway speed — one of the most dangerous failures a driver can experience. Too loose, and the wheel works free over the first 100 km; too tight, and the studs stretch or snap under load. The fix
A wheel comes off the balancer with a 0.25 oz imbalance marked at the 6 o’clock position. The operator cleans the spot, presses on an adhesive wheel weights strip, watches the display drop to zero, and rolls the wheel to the mounting rack — only to find the weight sitting
The stock wheel nuts on most cars do their work without anyone noticing them — until the day a wheel wobbles, a stud snaps, or a finish gets scratched during a tire swap. Aftermarket lug nuts solve the cosmetic problem but introduce a technical one: every wheel and stud combination
Below are the questions procurement teams ask most — both technical fitment and commercial terms. If yours is not here, send seat type, thread, length and finish and we reply with a specification-backed answer, usually within one working day. Every reply is framed for your buying process, not a generic template.
Yes. We can evaluate against your drawing or existing part before volume production, so you confirm grade, finish and fit on the actual vehicle. Send us the specs and we arrange sample and quote together, often at no tooling cost for standard configurations. This de-risks the first order and shortens your validation.
We support trial and recurring orders with straightforward terms; send thread, seat, length and finish and we quote the exact minimum for that configuration. Small first batches are welcome because most of our long-term accounts started that way and grew into container volumes. We aim to make the first order easy, not a hurdle.
Chrome (bright) and black (matte) are standard; custom colours and colour-matched caps are available for brand programs. All finishes are salt-spray tested for corrosion resistance before they leave the plant, with records on file. Tell us the look your market expects and we match it to the right process.
Yes — full OEM and ODM private-label packaging is standard, with bespoke threads, lengths and seat geometries built to your drawing. We hold your artwork on file for repeat orders so restocks stay consistent, and we can kit bolts with keys and instructions in one carton. That saves your team time at the shelf.
