Q1. What materials are mainly used by top spike wheel nuts manufacturers?
Most leading spike wheel nuts suppliers use 10.9 and 12.9 grade alloy steel for superior tensile strength (>1050 N/mm²), or 6061-T6 aluminum for lightweight, corrosion-resistant options, meeting or exceeding ISO898-2/SAE J995 standards.
Q2. What are the standard thread sizes and can they be customized?
Typical threads range from M12x1.25, M12x1.5, 1/2"-20 UNF, to M14x1.5. Most spike wheel nuts exporters offer full customization for diameter, thread pitch, and spike length based on customer needs.
Q3. What is the surface finishing process?
Standard surface finishes include zinc chromate, black oxide, chrome plating, and advanced PVD color coatings for corrosion resistance and aesthetics. Each batch is salt-spray tested to ASTM B117 (>200 h).
Q4. Which international certifications are obtained by spike wheel nuts companies?
Reputable manufacturers maintain ISO 9001, ISO 898-2, IATF16949 (automotive), and provide third-party SGS, TüV, or Intertek reports upon request.
Q5. How are spike wheel nuts installed and what torque is recommended?
Installation follows vehicle OEM specs: typically 95–120 Nm torque (70–90 ft-lb) for passenger vehicles. Use a calibrated torque wrench and apply thread locker for security. Always ensure threads are clean and undamaged.
Q6. What is the typical lead time and how is quality guaranteed?
Lead time for custom spike wheel nuts is 15–30 days (depends on spec & volume). 100% torque and dimensional inspection and full traceability are provided for every batch under ISO 9001 quality assurance.
Q7. What is the warranty period and after-sales support scope?
Most spike wheel nuts suppliers offer a 12–24 month warranty covering material or process defects. Responsive support is available for installation queries, and product replacement in case of verified quality issues.