Contact
Talk to the sales desk, not a contact form.
A person reads every message — usually within one shift. Quotes come back within one business day; a drawing review may take two, and we will tell you which one you are getting.
Best for drawings, specifications and RFQs. Attach the PDF; we read it on the phone screen otherwise.
Mon – Fri, 09:00 – 18:00 (GMT+8). A message left outside these hours is answered the next business morning.
Room 204-B110, Zone B, No. 560-1 South Luyuan Avenue, Tongzhou District, Beijing, China
北京市通州区潞苑南大街甲560号B区204-B110
Invoices, customs entries and supplier-onboarding paperwork carry this address.
Cixi, Ningbo, Zhejiang, China
Heading, thread rolling, heat treatment and optical sorting. Visits by appointment — we will arrange a line walk and a lab review.
Beijing Matrix Growth Technology Co., Ltd.
北京矩阵生长科技有限公司
ISO 9001:2015. Export licence and business licence copies available for supplier onboarding.
Response
What happens after you press send.
- First reply
- < 4 h within business hours, GMT+8
- Quote, standard SKU
- 1 day price, MOQ, pack, lead time, Incoterm
- Quote, to drawing
- 2 days with the tolerance we cannot hold
- Sample from a new die
- 5 – 8 d freight collect
Faster quotes
What to put in the first email.
Most quoting delays are one missing field. Send these six and the first reply is usually a price, not a question.
- Standard or drawing — DIN 933, ISO 4032, or a dimensioned PDF/STEP.
- Size and length — thread size, length, and full or partial thread.
- Property class and material — 8.8, 10.9, 12.9, A2-70, A4-80.
- Finish — zinc trivalent, hot-dip galvanized, zinc flake, plain.
- Quantity — per size, per shipment, and annual volume if you have it.
- Destination — port or city, and the Incoterm you buy on.