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01
Rail Transit
Fastening solutions for bogies, braking systems and vehicle connection assemblies.
Explore rail transit area →Shanghai · Since 2011
High-end specialty fasteners.Engineered for the real world
High-strength and non-standard bolting solutions for multi-variety, small-batch and demanding industrial projects.
- 10.9 / 12.9 grade capability
- M10–M100 product scope
- Full-process traceability
Business Areas
Solutions shaped by the application
From rail systems to heavy machinery, we translate load, environment, assembly and lifecycle requirements into practical fastening solutions.
02
Aerospace Equipment
Special studs and tensioning systems for high-speed forging presses.
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03
Mining Machinery
Heavy special bolts and thick nuts for shearers and coal haulers.
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04
Marine & Offshore
Class 12.9 bolts, studs and matching parts for marine and offshore cranes.
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05
Industrial Pumps
Long Class 12.9 socket-head bolts for high-pressure and vacuum pumps.
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06
High-End Equipment
Fastening support for TBMs, nuclear, chemical, tooling, wind and new energy.
Explore area →Core Products
Built around specifications,not catalogue limits
Representative product families across standard and drawing-based supply. Final selection is confirmed against industry, standard, grade and drawing.
Core Capabilities
A disciplined path from requirement to delivery
Caifu is positioned for complex requirements where engineering communication, controlled execution and responsive supply matter as much as the part itself.
Engineering Development
Material selection, process planning and drawing-based feasibility support for special fastening requirements.
Non-standard Customization
Flexible response to multi-variety, small-batch and high-requirement industrial projects.
Process Quality Control
Inspection and traceability from incoming material through production, final inspection and release.
Project-oriented Supply
Clear specification review, documented checkpoints and coordinated delivery against agreed requirements.
Since 2011Focused on engineered industrial fasteners
About Caifu
A National High-Tech Enterprise focused on one thing — high-end fasteners
Shanghai Caifu Mechanical Co., Ltd. (hereinafter referred to as “Caifu Machinery”) was established in 2011 as a National High-Tech Enterprise specializing in the R&D, design, manufacturing, and sales of high-end fasteners. The company is headquartered in Pudong New Area, Shanghai, with a modern production base in Zhejiang Province, ensuring a well-integrated supply chain and robust manufacturing capacity.
Core Business: High-strength bolts, nuts, washers, and custom non-standard fasteners.
Our core team comprises scholars, engineers, and technical professionals with deep-rooted expertise in the machinery industry. We are committed to continuous innovation and quality excellence across the entire fastener value chain—from raw material selection and machining processes to heat treatment and surface finishing technologies. Backed by stable process capabilities and a rigorous quality management system, our products deliver reliable performance and long-term durability, earning widespread recognition from both domestic and international clients.
Talk with our project team →Technology & Quality
Quality evidence belongs in the process
Quality backed by data, not empty claims
16 years
Industry expertise
1.35 M km
Rail testing validation
150+
Aerospace specifications
0
Customer complaints
Every batch traceable, every delivery verifiable.
Quality is made visible through controls customers can verify during a project—from requirement review to documented release.
- 01Requirement review
Standard, grade, material, dimensions, finish and acceptance criteria.
- 02Process definition
Machining, forming, rolling, heat treatment and surface treatment planning.
- 03Inspection & testing
Dimensional and mechanical-property verification according to project needs.
- 04Traceable release
Documented checkpoints, final inspection and batch-based records.
Project documentation
Ask for the evidence that matters to your application
Material documentation
Dimensional inspection
Mechanical test records
Process traceability
Discuss quality requirements
Solution Cards
Every fastening problem begins with a real-world condition
We start there, then work back to the material, process, and installation method that delivers a reliable result.
High Fatigue Resistance
Cyclic loading
Material + Structure + Heat treatment
1.35M km rail testing
Anti-Loosening System
Vibration loosening
Mechanical / Chemical locking
DIN 25201
Corrosion Resistance
Salt spray & marine
Multi-coating + Stainless
Salt spray testing
Extreme Temperature Performance
−60°C to 300°C
Low-temp toughness + High-temp stability
Bench validation
Custom Development
Multi-variety & small batch
Integrated R&D + Design + Manufacturing
T1 → Pilot → Mass
Global Reach
Serving demanding industrial clients worldwide
Our fasteners ship to equipment manufacturers, engineering contractors and distributors across three market tiers.
Germany
USA
Japan
Switzerland
Norway
Spain
Russia
Middle East
Southeast Asia
- Tier 1 — Core Markets
Germany · USA · Japan
- Tier 2 — Strategic Markets
Switzerland · Norway · Spain
- Tier 3 — Growth Markets
Russia · Middle East · Southeast Asia