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ISO 9001 & TS16949 certified fastener supplier exporting to over 60 countries. High-strength structural bolts, heavy hex nuts, anchor bolts, washers, and custom OEM solutions.
DOWEDO (Ningbo Windo Metal) Fastener Co., Ltd. – Your trusted source for high-quality construction and industrial fasteners since 1999.
As a leading supplier of fastener products in China, our bolts and nuts are exported to over 60 countries worldwide.
Since 1999, we have provided the highest quality fastener bolt & nut products and service for customers across industries.
We operate under ISO 9001:2008 and TS16949:2009 standards, ensuring consistent quality, on-time delivery, and competitive pricing.
ISO 9001:2008, TS16949:2009, RoHS compliant. One-year warranty with free replacement under abnormal conditions.
OEM manufacturing available. We produce any bolt, nut, or washer to your specifications and standards.
Your one-stop shop for bolts, nuts, washers, studs, anchors, and specialty fasteners in carbon, alloy, and stainless steel.
Precision-engineered bolts, nuts, washers, and structural fasteners meeting ASTM, DIN, ISO, GB, and custom specifications.
Metric heavy hex head, Grade 8.8, A325M compliant
F1554 Grade 36 / 55 / 105
Double end stud, full thread
Grade 8, A563M compliant
Flat & Spring Washers
A2-70, A4-70, 316 Stainless
ASTM A325 / A490
OEM & Non-Standard Designs
We combine advanced manufacturing, strict quality control, and customer-focused service to deliver reliable fastening solutions.
Modern workshop with CNC forming, threading, heat treatment, and automated finishing lines.
In-house lab with tensile testing, hardness checks, coating thickness, and chemical analysis.
Products shipped to over 60 countries with reliable logistics and documentation support.
We manufacture fasteners from carbon steel, alloy steel, stainless steel (A2/A4), aluminum, brass, and special alloys based on customer requirements.
Our finishing options include black oxide, zinc electroplating (Cr+3), phosphate, mechanical galvanization, hot dip galvanizing, Dacromet, and custom coatings.
Yes, we are a custom fastener manufacturer and accept OEM/ODM orders. We can produce to your drawings, samples, or specifications with full traceability.
MOQ varies by product and customization level. We support both large-volume production and small trial orders for new partnerships.
We follow ISO 9001:2008 and TS16949:2009 standards with in-process and final inspections, material certifications, and full documentation for every batch.
Contact us today for product inquiries, custom quotes, or technical support. We respond within 24 hours.
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