ISO 9001 Certified
18 Years Experience

High-Strength Washers & Fasteners Manufacturer

18 Years OEM/ODM Experience | 200M+ Annual Output

One-Stop Solution from Design to Mass Production

Trusted by Belt & Road Markets | $6M+ Annual Orders

18+
Years Manufacturing
200M+
Pieces/Year
30+
Automated Machines
24H
Sample Service
Product Excellence

Our Specialized Product Range

Precision-engineered washers and fasteners designed for the most demanding industrial applications

High-Strength Lock Washers

High-Strength Lock Washers

Engineered to prevent loosening under extreme conditions

Prevent Loosening
High-Stress Durability
±0.1mm Precision
Learn More
Butterfly Washers

Butterfly Washers

Secure fastening with easy installation design

Secure Fastening
Easy Installation
Versatile Applications
Learn More
French Washers

French Washers

High-precision applications requiring superior strength

High Precision
Superior Strength
Custom Engineering
Learn More
Serrated Washers

Serrated Washers

Internal/external toothed for enhanced grip

Enhanced Grip
Anti-Vibration
Dual Design Options
Learn More
Bearing Retaining Rings

Bearing Retaining Rings

Stable bearing positioning in mechanical components

Stable Positioning
Mechanical Integration
Reliable Performance
Learn More

Why Global Buyers Choose Insoer

Comprehensive customization capabilities backed by 18 years of manufacturing expertise

Multiple Material Options

Choose from premium-grade materials engineered for your specific application requirements

Stainless Steel (304/316)
Carbon Steel
Brass & Copper
Material comparison chart

Custom Surface Finishes

Advanced coating technologies for enhanced corrosion resistance and durability

Galvanizing
Nickel Plating
Passivation & Dacromet
Surface treatment samples

Dedicated Engineering Support

Expert technical guidance from design concept to mass production delivery

CAD-based Mold Manufacturing
Product Selection Solutions
5+ Years QC Experience
Engineer consultation

From Your CAD File to Mass Production in 3 Days

Industry-leading turnaround time with 24-hour sampling service and rapid scaling capabilities

24H
Sample Ready
72H
Mass Production
±0.1mm
Tolerance

Industrial-Scale Production Capacity

State-of-the-art manufacturing facility designed for high-volume, precision production

1,800㎡
Modern Facility
30+
Automated Machines
200M+
Pieces Annual Output
50+
Skilled Workers (Double-Shift)
300+
Tons Safety Stock

Flexible Order Options

Minimum Order Quantity

From 500 pieces (trial orders) to 1M+ (bulk production) with competitive pricing at every scale

Production Speed

24-hour sample delivery | 3-day mass production turnaround with quality assurance

Quality Guarantee

ISO 9001 certified processes with ±0.1mm precision and full batch traceability

Factory Tour

Take a Virtual Factory Tour

See our modern production lines in action

Quality Assurance

Triple-Layer Quality Control You Can Trust

18 years of manufacturing excellence backed by ISO 9001 certification and rigorous quality protocols.

01

Raw Material Inspection

Partnerships with Tier-1 Steel Mills

Full material traceability from source to production with certified mill test certificates

02

Production Control

±0.1mm Precision Control

Real-time monitoring with CNC precision and automated quality checkpoints

03

Pre-Shipment Inspection

100% Batch Testing

Traceable by batch number with comprehensive final quality reports

Certifications & Standards

ISO 9001:2015 Certified

Quality Management System

Industry Standards

ASTM, DIN, JIS compliance

Third-Party Reports

Independent inspection available

Quality Guarantee

"Every Product Carries Our 18-Year Reputation"

We stand behind every washer and fastener with comprehensive quality assurance. Any quality issues are resolved within 24 hours with full replacement guarantee.

Market Proof

Trusted by Global Brands & Distributors

Serving construction, mining, and automotive industries across Belt & Road markets.

$6M+
Annual Procurement Volume
30+
Belt & Road Markets
500+
Active Clients
18
Years Experience

Application Industries

Construction Industry

Construction

High-rise buildings, infrastructure projects

Mining Industry

Mining

Heavy-duty equipment, extraction machinery

Heavy Machinery Industry

Heavy Machinery

Industrial equipment, manufacturing lines

Automotive Industry

Automotive

Vehicle assembly, aftermarket parts

What Our Clients Say

"Consistent quality across every batch. Their washers have never failed in our construction projects. The precision is remarkable."

CM
Construction Manager
Major Infrastructure Project

"Lightning-fast delivery! 24-hour sampling and 3-day production saved our project timeline. Exceptional service."

PM
Procurement Manager
Mining Equipment Manufacturer

"Perfect custom solutions! Their engineering team understood our unique requirements and delivered exactly what we needed."

ED
Engineering Director
Automotive Parts Supplier
Supply Chain

Reliable Supply Chain You Can Depend On

Strategic partnerships and inventory management ensuring consistent supply and stable pricing.

Direct Sourcing

Tier-1 Steel Mill Partnerships

Strategic alliances with leading steel manufacturers ensure consistent raw material quality, competitive pricing, and priority allocation during market fluctuations.

Price Stability

Seasonal Purchasing Programs

Advanced procurement strategies and bulk purchasing agreements provide price protection and stable costs for our clients throughout market volatility.

Inventory Ready

300+ Tons Safety Stock

Comprehensive inventory management with ready-to-ship stock of popular sizes and specifications, ensuring immediate availability for urgent orders.

Stable Production

Double-Shift, 50+ Workers

Experienced workforce operating dual shifts with cross-trained teams ensuring continuous production capacity and consistent delivery schedules.

Our Risk Mitigation Promise

"We Absorb Material Price Fluctuations to Protect Your Budget"

Through strategic inventory management and forward purchasing contracts, we shield our clients from market volatility. Your project budgets remain stable while we handle the supply chain complexity.

18
Years Market Experience
99.5%
On-Time Delivery Rate
Zero
Supply Chain Disruptions
Free Sample Available

Start Your Order Today - Free Sample & Consultation

Get your custom sample kit with technical drawings and specifications within 24 hours. No obligation, completely free.

Free Sample + Technical Drawing
Free Sample Kit

What You'll Receive

Free Sample Kit (3-5 pieces)

Physical samples of your selected products for testing

Technical Drawing & Specification

Detailed CAD drawings with precise measurements

24-Hour Response Guarantee

Direct connection with our engineering team

No Obligation Quote

Competitive pricing with transparent cost breakdown

Prefer Direct Contact?

Chat Now on WhatsApp
+86-130-7393-77
Email Us
sales@insoer.com

Get Your Free Sample

Fill out the form below and we'll send your sample kit within 24 hours

Your information is 100% confidential
Our team responds within 2 hours (GMT+8)

Download Our Resources

Get instant access to our comprehensive guides and technical documentation to help you make informed decisions.

Product Catalog (PDF)

Complete product specifications, dimensions, and technical details for all our washer and fastener products.

200+ Product Specifications
Technical Drawings Included
Material & Surface Options

Material Comparison Guide

Choose the right material for your application with our comprehensive comparison of stainless steel, carbon steel, and specialty alloys.

Material Properties Chart
Application Recommendations
Cost-Performance Analysis

Custom Solution Checklist

What we need to start your custom order - a complete checklist to ensure smooth project initiation and accurate quoting.

Project Requirements Template
CAD File Preparation Guide
Timeline & Pricing Factors

Download All Resources

Get instant access to our complete resource library