Project Description

Audi S3

Data: PCD 5×112 CB 57.1
Surface: BOLT
Thread Type: M14x1.5
Length: 27mm
Seat Type: Ball  (Modified Conical Seat)
(Pay attention: the reason why the customer chooses conical seat bolts is according to the wheels, the bolts seat type should match the wheel seat type.)
Audi S3 install BONOSS Forged Grade 12.9 Shell Type Lock Bolt Kits (4).jpg
Detail Listing:
BONOSS Forged Grade 12.9 Shell Type Lock Bolt Kits (Black)
RAYS G16 19’’ Wheels
Michelin Tires
(Thanks for the owner providing the images)

S3 is a performance car that can stimulate people’s desire to drive. When you sit in it, it feels lower than the ordinary A3 chassis. The steering wheel feels particularly good, and it feels particularly at ease to hold, especially in sports mode, when the steering wheel sinks. The field of view is low and there is a desire for drag racing. The feeling of pushing the back is still strong, the body shakes slightly when it rushes forward violently, and the line of sight is kept on the road ahead but you can see the crazy beating tachometer, and the charming exhaust sound can be heard when the gearbox is shifted.


Audi S3 is a performance car with a lot of space for modification. Many people choose to modify the engine part of the kit, and some people choose the details on the wheel hub. As a company that specializes in designing and producing shell bolts, it is chosen by many car owners who love modification culture, so what are you waiting for?

In short, replacing the lug nuts or bolts is not expensive, but it is the fastest part of enhancing the visual effect. At the same time, if you use lighter wheel bolts, they will improve the performance of the vehicle to a certain extent. BONOSS is proud to announce the release of an all-new racing lug bolt. It’s called BONOSS Forged Grade 12.9 Shell Type Lock Wheel Bolt. We upgrade the exterior of traditional lug bolts, matching the bolt with a shell for protecting the bolts from debris and water corrosion and maximally beautifying your wheels.

Our lug wheel bolts are thoroughly tested and inspected, approved by SGS, TUV authoritative institutions, truly guarantee safety:

Test Items of BONOSS Shell Type Lock Bolt Kit
Tensile Strength 1220MPa (Test Method: ISO 898)
Ultimate Tensile Load 152000N (Test Method: ISO 898)
Proof Load 121000N (Test Method: ISO898)
Hardness (HV) 395 (Test Method: ISO 6507)
Wedge Loading Angle 4° (Test Method: ISO 898)
Limited Life Range Test 2000000 Stress Cycles Without Damage (ISO 3800)
Neutral Salt Spray Test 500H (Test Method: ISO 9227)

For detailed test reports, please check SGS, TUV Certification.

Additional Information:

  • BONOSS Forged Grade 12.9 Shell Type Lock Bolt Kit colors can be customized flexibly. Thus, if you would like different colors of shell type lock bolt kits, feel free to contact us. The data of this Audi S3 are 27mm (1”), PCD 5*112, CB 57.1, conical seat bolts M14*1.5, 17mm Socket.
  • The extended bolts are shell structure design, which effectively protects the bolts from rusting. This Audi S3 uses conical seat bolts. If you would like a set of shell type lock bolt kits, please ensure the seat type of the bolts is suitable for threading tightly. And, if you don’t know the proper length, you are welcomed to contact our tech staff freely.
  • Each BONOSS product is printed with the logo of “BONOSS”. This offers an easy method to distinguish other fake and inferior products. At the same time, it also provides a way to find our after-sales service. Our products are 10 Years Limited Warranty (new products with 12 months warranty), which is an excellent and cost-effective choice for your car upgrades.

Interested in purchasing? Click HERE to know more!