YEARS OF EXPERIENCE
in Manufacturing Wheel Fasteners
With more than 40 years of experience in manufacturing wheel fasteners,
TPi has become the expert in forging wheel fasteners.
Quality Assured
We are devoted to making products that meet the highest standards of safety, durability, and insist on producing all our fasteners in Taiwan as to be able to supervise and control each stage of production, assuring our consistent quality.
Our CertificationsTAF-iLac Certified Laboratory
Gourmet Equipment (Taiwan) Corporation, TPi’s parent company, owns in house laboratory and the laboratory has been certified by TAF-iLac in 2016. This proves the laboratory conforms to the general requirements for the competence to carry out tests and/or calibration required by International Standard Organization, and also ensures the laboratory gets the same verification capability as SGS. This manifests TPi’s permanent promise for our customers-persistent improvement and stable quality on our products. Please refer to the certificate below to see our accredited scope.
TAF CertificateDevelopment And Quality
We have a complete and successful Quality Management System (QMS) that is IATF 16949 certified by TUV Rheinland. We have our in-house laboratory checking parts at different stages of production. All TPi conducts tests on durability, torque, fatigue test, torque retention, and chemical composition analysis. TPi is proud to offer our Quality Check Report to our customers.
10 Million Insurance Coverage
TPi is the ONLY wheel fastener manufacturer who issues products insurance of USD 10,000,000 for our customers. No one does that, but TPi does.
Certificate
Chemical Analysis Equipment
Optical Emission Spectrometer 
Mechanical Tester
- Universal Torque Testing Machine
- Torque Wrench
- Automatic Hardness Tester
Dimensional Measure Instrutment
- Head Thickness Gauge
- Profile Projector
- Punch Gauge
- Digital Height Gauge
- Caliper
- Micrometer
- 2.5D - Image Processing Measuring Instrument
- Coordinate Measuring Machine
- Gauge Block
- Ring Gauge
- Plug Gauge
Other Performance Tester
- Salt Spray Testing Machine
- Bolt Torsion Testing Machine
- X-ray Coating Thickness Measurement
- Microscope
- Pendulum Impact Tester
- Cutting machine
- Electrical Conductivity Meter
Operation Process
Material Analysis
TAF-ILAC certified laboratory for material inspection and functional properties test.
Cold Forging
Forging Capability (mm): 100L x 32 Dia., 60L x 34Dia.
Threading
Speed efficient and accurate auto-threading system.
Welding
Cost-effective lug nut production method, finest technology, maintaining great look.
Heat Treatment
Carbonized or straight-treatment, to achieve required hardness.
Tumbling
Polish and smoothen product’s surface, preparing parts for plating.
Plating
Advanced triple nickel/ chrome plating or zinc plating technology for even and corrosion-resistant coating.
Quality Control
High precision specification measurement check, chemical composition analysis, and physical properties check.
Warehousing
Efficient & spacious automatic retrieval and storage system.
Optical Sorting
In-house designed optical sorting machine to do 100% lock pattern & thread size identification.
Auto-packaging
Automatic packaging facility to do customized package.
Shipping
Store all the consignment in our warehouse and retrieve the good with care and make the shipment.