SINOFASTENER — Est. 1990 · Ningbo, China · Serving 80+ countries
Dual-Certified Fasteners. One Source.
China’s first manufacturer with both EN14399 & EN15048 certification. 50,000-ton annual capacity. Full standard coverage from M12 to M64 — DIN, EN, ISO, ASTM, ANSI, BS.Every batch lab-tested before shipment
Sales network: Europe · Americas · Middle East · Southeast Asia · Russia · Africa · China
PRODUCT SERIES
Five series. One source factory.
We produce bolts, nuts, washers, thread rods and screws under one roof — so one purchase order covers the whole kit.
QUALITY ASSURANCE PLATFORM
We don't ask you to trust us.
We ask you to trust the data.
Every batch that leaves our facility is tested in our independent in-house laboratory — CNAS accreditation in progress (ISO/IEC 17025). Tensile, hardness, salt spray, coating thickness and chemical composition, with a test report for every order.
- Independent in-house laboratory — CNAS accreditation in progress
- Test reports shipped with every order — tensile, hardness, salt spray
- Full material traceability — heat number to batch to delivery
- DIN, ISO, ASTM and EN compliance across the product range
Years in fastening
Manufacturing in Ningbo since 1990.
Countries served
Exports across Europe, Americas, Middle East & Asia.
Product categories
One purchase order covers the whole kit.
Qualified suppliers
In-house production + rigorously selected outsourcing.
THREE-STAGE QC PROCESS
Full process quality control.
From steel wire rod to packed crate — every stage is inspected, recorded and traceable by heat number.
STAGE 1
Incoming Inspection
- Spectral analysis of chemical composition
- Hardness testing on raw materials
- Heat number recording for traceability
STAGE 2
In-Process Inspection
- First Article Inspection (FAI)
- Sampling across forming, heat treatment, threading
- Non-conforming product isolation
STAGE 3
Final Inspection
- Full dimensional check — thread gauges, OD, length
- Mechanical testing — tensile, proof load, hardness
- Surface quality + final inspection report per batch
Bolt Series
Hex, anchor, U-bolt, carriage, eye & hook bolts
Nut Series
Hex, heavy hex, nylon insert, A194 / A563
Full traceability chain
Steel wire rod (heat no.) → incoming inspection → production monitoring → final inspection → packaging & delivery.
CERTIFICATIONS & COMPLIANCE
Certified. Audited. Documented.
Internationally audited systems for quality, environment and occupational health & safety.
CERTIFICATIONS & COMPLIANCE
Internationally audited systems for quality, environment and occupational health & safety.
CE EN 1090
Internationally audited systems for quality, environment and occupational health & safety.
Zhejiang Manufacturing DB33/T 944
Internationally audited systems for quality, environment and occupational health & safety.
Fastener Standards Committee
Internationally audited systems for quality, environment and occupational health & safety.
INDUSTRIES WE SERVE
Nine industries. One source factory.
Nine dedicated application lines — each with the right grades, coatings and certifications for the job.
Steel Structure
High-strength bolts for construction · ASTM A490 · DTI washers · EN 1090-2
Power Towers
Tower bolts & U-bolts · pig tail hook bolts · EN 14566
Foundations & Anchor
L-type / J-type / U-type anchor bolts · eye bolts
Tanks & Silos
Bin bolts · fin bolts · flange bolts · flat washers
Water & Sewer
COR-TEN bolts & nuts · MJ gasket packs for ductile iron pipe
Marine & Offshore
Corrosion-resistant · PTFE-coated · brass · DIN 444 eye bolts
Petrochemical & Oil & Gas
ASTM A193 stud bolts · A194 heavy hex nuts · PTFE coated
Mining & Underground
Rock bolts · split set friction bolts · track & fish bolts
Ropeway & Cable Car
Bow / D shackles EN 13889 · U-bolts DIN 3570 · wire rope thimbles
Need a drawing, not a catalog part?
Send your print — we’ll quote custom fasteners from our own rolling, forging and CNC lines.
PACKAGING & DELIVERY
Packed for the journey.
Export-grade crates, pallets and drums — bundled, labeled and seaworthy before anything leaves the plant.
Bolt Series
Hex, anchor, U-bolt, carriage, eye & hook bolts
Nut Series
Hex, heavy hex, nylon insert, A194 / A563
Washer Series
Flat, DTI, nylon, bearing & dome plates
Thread Rod Series
Full thread, double-end studs, DIN 976 / 938
Screw Series
Self-drilling, drywall, socket head cap screws
ABOUT SINOFASTENER
1990. A small workshop. Thirty-six years later — 80 countries.
In 1990 a small fastener workshop opened in Ningbo, China. With 36+ years of manufacturing and trading experience, SINOFASTENER serves over 80 countries as a source factory for bolts, nuts and custom fasteners.
We run a dual-driven model of in-house production + rigorously selected outsourcing, backed by a network of over 200 qualified supplier partners and our own independent laboratory. Every batch — self-manufactured or outsourced — is strictly inspected and shipped with an independent test report, for full traceability from source to delivery.
CONTACT
Talk to our engineers.
Tell us your application, standard and quantity — we’ll come back with a spec check, alternatives and a factory-direct quote.
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No. 8, Changying Road, Jiulonghu,
Zhenhai, Ningbo, Zhejiang, China -
tel:+86086592068
sales@sinofastener.com -
Mon – Fri · 8:30 – 17:30 (GMT+8)
Live on WhatsApp & email