Contact Us

Let's talk specifications,
volumes and lead-times.

Whether you need a single FCL of standard drywall screws or a custom-spec OEM run with branded retail packs, we respond fast and quote straight. Send us your details below.

Shanghai Office

Sales, technical and customer support.

Address86 Caobao Road, Xuhui District,
Shanghai, China
Phone+86 21 6487 6003

Haiyan Factory

Production, quality control and shipping.

AddressNo.1 Xinfeng Road, Qinshang Town,
Haiyan, Zhejiang, China
Phone+86 573 8640 8558
Emailsundp@zinsn.com

Business Hours

Mon – Fri09:00 – 18:00 (China Standard Time)
Saturday09:00 – 13:00 (sales only)
SundayWhatsApp messages answered
What Happens Next

From inquiry to first container — a clear path.

01

Inquiry Review

Within 24 hours, our technical sales team reviews your requirements and confirms feasibility.

02

Quotation

You receive a detailed quote: pricing, lead-time, packaging, MOQ and incoterms.

03

Sample Approval

For new specs we ship physical samples for your approval before tooling and production.

04

Production & QC

Order is scheduled into the line; in-process and final QC reports are shared.

05

Shipping

FOB Shanghai or Ningbo by default; CIF or DDP available. Documentation handled in-house.

06

After-Sales

Your assigned account manager handles re-orders, claims and new product development.

Chat on WhatsApp