Premium Washers & Fasteners
Trusted OEM/ODM manufacturer serving Belt & Road Initiative markets with over $6M annual procurement volume. From design to mass production - your one-stop solution for high-strength locking washers and custom fasteners.
✓ 24H Sampling Service ✓ ISO 9001 Certified ✓ 200M+ Units Annual Capacity
Comprehensive Product Solutions
From high-strength locking washers to custom fasteners, we deliver precision-engineered components for construction, mining, heavy machinery, and automotive industries.
View All ProductsHigh-Strength Locking Washers
Engineered to enhance bolt durability and prevent loosening under high-stress conditions. Perfect for construction and heavy machinery applications requiring maximum reliability.
Butterfly Washers
Provide secure fastening with easy installation features. Designed for applications requiring quick assembly and reliable performance in automotive and industrial equipment.
French Washers
Specifically designed for applications requiring high precision and strength. Ideal for specialized industrial equipment and critical fastening applications.
Internal/External Serrated Washers
Enhanced gripping power and vibration resistance through precision-engineered serrated edges. Essential for mining equipment and heavy-duty machinery applications.
Manufacturing Excellence
18 years of OEM/ODM expertise, advanced production capabilities, and unwavering commitment to quality make us your trusted manufacturing partner.
Rapid Production & Sampling
24-hour sampling service with 3-day mass production launch. Our streamlined processes and dedicated production lines ensure quick turnaround without compromising quality.
±0.1mm Precision Control
CNC-controlled precision with three-stage quality inspection. Every product undergoes rigorous testing from raw materials to final shipment with full batch traceability.
Flexible Order Capacity
From 500-unit trial orders to 1M+ bulk production. Our 8 production lines and 200M+ annual capacity accommodate both small-batch testing and large-scale manufacturing needs.
Stable Supply Chain
300+ tons ready stock with direct partnerships from primary steel mills. Dual-shift production and seasonal procurement planning ensure price stability and consistent delivery.
Quality Certifications
Our commitment to excellence is validated by international quality standards and certifications, ensuring every product meets the highest industry requirements.
- ISO 9001:2015 Quality Management System Certification
- International Fastener Standards Compliance (DIN, ANSI, JIS)
- Material Testing & Batch Traceability Documentation
Trusted by Global Partners
Serving brands, wholesalers, and retailers across Belt & Road Initiative countries with reliable manufacturing partnerships and consistent quality delivery.
Client Success Stories
"Insoer's precision and reliability have been game-changing for our construction projects. Their 24-hour sampling service and consistent quality delivery make them our preferred fastener supplier across multiple markets."
"The custom locking washers from Insoer have significantly improved our heavy machinery performance. Their engineering support and flexible production capacity perfectly match our growing business needs."
"Outstanding quality control and delivery reliability. Insoer's ISO certification and batch traceability give us confidence in our automotive supply chain. They've been a trusted partner for over 5 years."
"From small trial orders to million-unit productions, Insoer scales seamlessly with our business growth. Their technical expertise in custom fastener development is unmatched in the industry."
Start Your Custom Manufacturing
Ready to discuss your fastener requirements? Our engineering team is standing by to provide technical consultation and custom solutions for your specific applications.
Quick Contact
- sales@insoer.com
- +86 577 8888 9999
- 24/7 Engineering Support
B2B Professional Services: We exclusively serve manufacturers, distributors, and industrial clients. Minimum order quantities apply for custom manufacturing projects.