Factory Tour: Inside Chaoshuo Trading Fastener Production

Take a virtual tour of Chaoshuo Trading’s fastener manufacturing facility in Yongnian, China. See our production process, quality control, and commitment to delivering premium fasteners worldwide.

Welcome to Chaoshuo Trading

Location: Yongnian District, Handan City, Hebei Province, China
Established: 2015
Specialization: Full-range industrial fasteners
Markets: 50+ countries across Asia, Europe, Americas, Middle East, Africa

Yongnian is China’s largest fastener distribution center, often called the “Fastener Capital of China.” Our factory is strategically located in the heart of this industrial cluster, giving us access to:

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• Premium raw material suppliers
• Skilled workforce with fastener expertise
• Advanced manufacturing infrastructure
• Efficient logistics networks

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Our Facility Overview

Factory Statistics

| Metric | Value |

|——–|——-|

| Total area | 15,000 m² |

| Production workshops | 6 |

| Production lines | 12 |

| Cold heading machines | 40+ |

| Thread rolling machines | 30+ |

| Annual capacity | 5,000+ tons |

| Employees | 120+ |

Production Capabilities

Product range:

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• Hex bolts (M3-M64)
• Nuts (M3-M64)
• Washers (M3-M64)
• Screws (M3-M24)
• Threaded rods (M6-M36)
• Anchor bolts (custom)
• Non-standard fasteners (per drawing)

`nMaterials:

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• Carbon steel (low, medium, alloy)
• Stainless steel (304, 316, 316L)
• Brass and other alloys

`nStrength grades:

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• Metric: 4.8, 8.8, 10.9, 12.9
• Imperial: Grade 2, 5, 8
• ASTM: A307, A325, A490, A193

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Production Process Walkthrough

Step 1: Raw Material Reception

What happens:

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• Steel wire rods arrive from certified suppliers
• Material test certificates (MTC) verified
• Chemical composition analysis (spectrometer)
• Dimensional inspection (diameter, roundness)
• Storage in organized warehouse

`nQuality control:

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• Every batch tested before use
• Traceability system (batch number tracking)
• Proper storage conditions (dry, organized)

`nKey equipment:

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• Optical emission spectrometer (chemical analysis)
• Calipers, micrometers (dimensional check)
• Overhead cranes (material handling)

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Step 2: Wire Drawing

What happens:

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• Steel wire rods (5.5-20mm) drawn to required diameter
• Multiple drawing passes through progressive dies
• Intermediate annealing (heat treatment) for ductility
• Lubrication application (phosphate coating)

`nQuality control:

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• Diameter checked every 100 coils
• Surface quality inspection
• Tensile testing (every batch)

`nKey equipment:

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• Wire drawing machines (multi-stage)
• Annealing furnaces
• Phosphate coating line

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Step 3: Cold Heading (Forming)

What happens:

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• Wire cut to length (blanks)
• Blanks formed into bolt/nut shapes
• Multi-station cold heading machines
• High-speed production (100-300 pieces/minute)

`nQuality control:

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• First-piece inspection (every setup)
• Hourly dimension checks
• Visual inspection (surface defects)
• Weight verification

`nKey equipment:

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• Cold heading machines (2-die, 3-die, 4-die)
• Progressive headers (complex shapes)
• Automatic feeders

`nCapabilities:

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• M3 to M36 standard sizes
• Custom shapes per drawing
• High-volume production (millions of pieces/month)

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Step 4: Thread Rolling

What happens:

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• Blanks fed into thread rolling machines
• Threads formed by cold working (no cutting)
• Precision dies create accurate thread profile
• Continuous production

`nQuality control:

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• Thread gauge testing (go/no-go)
• Pitch and diameter verification
• Surface finish inspection
• Hardness testing (sample)

`nKey equipment:

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• Flat die thread rollers
• Planetary thread rollers (high precision)
• Automatic feeders

`nAdvantages of cold rolling:

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• Stronger threads (work hardening)
• Better surface finish
• Higher production speed
• Material savings (no cutting waste)

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Step 5: Heat Treatment

What happens:

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• Fasteners heated to specific temperature
• Held for controlled time
• Quenched (rapid cooling)
• Tempered (reheated to lower temperature)
• Result: desired hardness and strength

`nFor Grade 8.8:

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• Quenching: 850°C → oil quench
• Tempering: 450°C → air cool

`nFor Grade 10.9:

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• Quenching: 870°C → oil quench
• Tempering: 380°C → air cool

`nFor Grade 12.9:

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• Quenching: 900°C → oil quench
• Tempering: 350°C → air cool

`nQuality control:

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• Hardness testing (every furnace load)
• Metallographic examination (microstructure)
• Tensile testing (sample from each batch)
• Temperature monitoring (continuous)

`nKey equipment:

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• Continuous furnaces (mesh belt)
• Batch furnaces (smaller lots)
• Quenching tanks (oil, polymer)
• Tempering ovens

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Step 6: Surface Treatment

What happens:

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• Fasteners cleaned (degreasing, pickling)
• Coating applied (zinc, HDG, Dacromet)
• Cured or passivated
• Inspection and packaging

`nCoating options:

Zinc plating (electroplating):

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• Thickness: 8-12 μm
• Process: electrochemical deposition
• Appearance: bright silver or yellow
• Salt spray: 48-96 hours

`nHot-dip galvanizing (HDG):

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• Thickness: 45-85 μm
• Process: immersion in molten zinc (450°C)
• Appearance: dull gray, spangled
• Salt spray: 500+ hours

`nDacromet (zinc flake):

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• Thickness: 6-8 μm
• Process: dip-spin and bake (300°C)
• Appearance: matte silver-gray
• Salt spray: 1000+ hours

`nQuality control:

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• Coating thickness measurement (magnetic gauge)
• Salt spray testing (sample)
• Adhesion testing (tape test)
• Visual inspection (coverage, defects)

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Step 7: Quality Inspection

What happens:

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• 100% visual inspection (automated or manual)
• Dimensional inspection (sampling per AQL)
• Functional testing (thread gauge, assembly)
• Mechanical testing (tensile, hardness)
• Final approval

`nInspection standards:

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• Visual: ISO 6157 (fastener surface defects)
• Dimensional: ISO 898, ISO 4759
• Sampling: ISO 2859-1 (AQL 2.5 for major defects)

`nTesting equipment:

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• Universal tensile testing machine (up to 100 tons)
• Hardness testers (Rockwell, Vickers)
• Thread gauges (go/no-go)
• Coating thickness gauges
• Salt spray test chamber
• Optical comparators (precision measurement)

`nDocumentation:

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• Mill test certificates (MTC)
• Inspection reports
• Material traceability records
• Compliance certificates (RoHS, REACH)

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Step 8: Packaging and Shipping

What happens:

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• Fasteners counted and weighed
• Packed in plastic bags (1-5 kg each)
• Bags placed in cartons (20-25 kg)
• Cartons stacked on pallets
• Pallets wrapped and labeled
• Loaded into containers

`nPacking options:

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• Bulk packing (loose in cartons)
• Small boxes (for retail)
• Custom packing (per customer requirement)

`nContainer loading:

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• 20′ container: 20-25 tons
• 40′ container: 25-27 tons
• Professional loading (maximize space, prevent damage)

`nDocumentation:

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• Commercial invoice
• Packing list
• Bill of lading
• Certificate of origin
• Quality certificates

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Quality Control System

Our Quality Philosophy

“Quality is not just inspection—it’s built into every process.”

Quality Certifications

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• ISO 9001:2015 — Quality management system
• ISO 14001:2015 — Environmental management
• CE marking — European conformity (when required)
• RoHS compliance — Restriction of hazardous substances

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Quality Control Process

| Stage | Inspection | Frequency | Equipment |

|——-|———–|———–|———–|

| Incoming | Raw material | Every batch | Spectrometer, calipers |

| In-process | Dimensional | Hourly | Calipers, micrometers |

| In-process | Visual | Continuous | Visual, magnifying glass |

| Final | Dimensional | Per AQL | Thread gauges, calipers |

| Final | Mechanical | Per batch | Tensile machine, hardness tester |

Traceability

Every batch is traceable from:

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• Raw material supplier and batch
• Production date and operator
• Heat treatment furnace and cycle
• Surface treatment batch
• Inspection results and inspector
• Shipping records and customer

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Our Team

Leadership

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• General Manager: 15+ years in fastener industry
• Production Manager: 12+ years manufacturing experience
• Quality Manager: 10+ years QC experience, certified auditor
• Sales Manager: 10+ years export experience, fluent English

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Workforce

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• Total employees: 120+
• Production workers: 80+ (skilled machine operators)
• Quality staff: 15 (dedicated QC team)
• Technical staff: 10 (engineers, technicians)
• Admin & sales: 15+ (office staff)

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Training

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• New employee training (1 month)
• On-the-job training (continuous)
• Quality awareness training (quarterly)
• Safety training (annual)
• Skills certification (internal)

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Why Choose Chaoshuo Trading?

1. Factory Direct Pricing

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• No middlemen, no markup
• Competitive prices for bulk orders
• Transparent cost breakdown
• Long-term partnership discounts

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2. Full Product Range

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• One-stop shop for all fastener needs
• Standard and custom products
• Multiple materials and coatings
• Metric and imperial sizes

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3. Quality Assurance

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• ISO 9001 certified
• 100% inspection before shipping
• Full documentation provided
• Third-party inspection welcome

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4. Fast Delivery

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• Standard items: 7-15 days
• Custom items: 15-30 days
• Large orders: 30-45 days
• Expedited options available

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5. Export Experience

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• 10+ years exporting worldwide
• 50+ countries served
• Full documentation (invoice, packing list, CO, MTC)
• Familiar with customs requirements

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6. Customer Service

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• English-speaking sales team
• Quick response (within 24 hours)
• Technical support available
• After-sales service

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Customer Testimonials

Construction Company, Australia

“We’ve been ordering hex bolts and nuts from Chaoshuo Trading for 3 years. Quality is consistent, prices are competitive, and delivery is always on time. Their QC team is professional and provides full documentation.”

Solar Installation Company, Germany

“We need high-quality stainless steel fasteners for our solar projects. Chaoshuo Trading supplies A4-80 bolts that meet our strict requirements. Their salt spray test reports give us confidence in the product.”

Machinery Manufacturer, USA

“We order custom non-standard fasteners from Chaoshuo Trading. They can produce to our drawings with tight tolerances. Communication is excellent despite the time zone difference.”

Trading Company, Dubai

“We buy various fasteners from Chaoshuo Trading for our Middle East distribution. They have full range, good prices, and reliable quality. We’ve never had a quality complaint from our customers.”

Visit Our Factory

We welcome customers to visit our factory and see our production process firsthand.

What you’ll see:

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• Complete production facilities
• Quality control laboratory
• Raw material and finished goods warehouse
• Meet our team in person
• Discuss your requirements face-to-face

`nHow to arrange:

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• Contact us 1-2 weeks in advance
• We can arrange airport pickup (Handan or Beijing)
• Hotel accommodation assistance
• Factory tour + technical discussion (half day or full day)

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Ready to Start Your Project?

Chaoshuo Trading is your reliable fastener partner:

✅ Factory direct pricing

✅ Full product range (M3-M64)

✅ ISO 9001 certified quality

✅ Fast delivery (7-45 days)

✅ Export to 50+ countries

✅ English-speaking team

Get a free quote today: Contact Us →

Or request a factory visit: Email us →

Related pages: About Us | Contact Us | 3D Product Catalog