Get In Touch
Whether you need technical consultation, custom threading solutions, or a competitive quote -- our engineering team responds within 12 hours.
Send Us an Inquiry
Tell us about your threading requirements. Free samples available (up to 10 units) for technical validation.
Visit Our Factory
Located in Zhuzhou, Hunan -- the "Carbide Capital" of China. Factory tours available by appointment.
Office Address
NO.1621, Block 10, Kangqiao Meiju,
Tianyuan District, Zhuzhou,
Hunan, China
Business Hours
Monday - Saturday: 9:00 AM - 6:00 PM (CST)
Sunday: By appointment only
Website
www.zhirongcarbide.comCooperation FAQ
Answers to the most common questions from our global partners and prospective clients.
What is the Minimum Order Quantity (MOQ)?
No minimum order quantity. We welcome orders of all sizes -- from a single prototype batch to large-scale production runs of 100,000+ pieces. For initial evaluation, we provide up to 10 free samples (shipping cost only). Volume pricing tiers are available for orders exceeding 500 units.
What certifications do your products carry?
All products strictly adhere to DIN 371/376, ISO 529, and ANSI standards with precision tolerance classes (6H, 6G, 2B, 3B). We hold CE, ROHS, and REACH certifications. Material test reports and dimensional inspection certificates are provided with every shipment. Custom inspection protocols are available upon request for aerospace and medical customers.
What is the typical lead time?
Standard products: 5-7 business days from stock. Custom geometries: 15-20 business days including coating. Samples: Ship within 3 business days. We maintain safety stock for high-demand items and offer expedited production for urgent requirements at a nominal surcharge.
Do you offer OEM / private labeling services?
Yes. We provide full OEM and white-label capabilities including custom laser engraving, branded packaging, and bespoke geometry modifications. Our engineering team (Ph.D.-led, with former KORLOY R&D expertise) can develop custom tap designs for specific applications -- from micro-threading in medical devices to API/NPT threading for oil & gas.
What materials can your taps handle?
Our carbide and HSS-PM taps are engineered for a wide range of materials: carbon steel, stainless steel (304/316), aluminum alloys (Al-Si), titanium (Ti-6Al-4V), Inconel 718, 17-4 PH stainless, and more. Advanced PVD coatings (AlTiN, TiCN, CrN, AlCrN) are matched to specific workpiece materials for optimized tool life and surface finish.
What payment methods and shipping options do you accept?
We accept T/T (bank transfer), PayPal, and Western Union. Standard payment terms: 30% deposit + 70% before shipment. Long-term partners may qualify for net-30 terms. Shipping via DHL, FedEx, UPS (express 3-5 days) or sea freight for large orders. All shipments include tracking and insurance.
Ready to Optimize Your Threading Process?
Get free technical consultation and up to 10 sample taps for your evaluation. Our Ph.D. engineering team is ready to solve your toughest threading challenges.