1. Product Overview
We are pleased to officially launch our upgraded full series of structural washers at Ningbo Gangtong Zheli Fasteners. This new line includes ASTM F436 hardened flat washers, DIN 125 flat washers, DIN 127 spring lock washers, and DIN 6916 high-strength structural washers, fully matching high-strength bolts such as ASTM A325/A490, DIN 6914, and DIN 931/933.
All washers comply with ASTM, DIN, EN, ISO 898-1 standards, providing stable load distribution, anti-loosening, and surface protection for steel structures, bridges, machinery, and engineering projects.
2. Core Features of Our New Washer Series
Hardened & high-strength: Forged and heat-treated to meet structural load requirements
Uniform thickness & flatness: Strict dimensional tolerance for stable assembly
Strong load distribution: Reduces embedment and protects workpiece surfaces
Anti-loosening performance: Spring washers provide reliable locking force
Wide compatibility: Matches hex bolts, heavy hex bolts, and threaded rods
Various finishes: Plain, black oxide, HDG, electro galvanizing, mechanical zinc
3. Washer Product Specification Table
Washer Type | Standard | Material | Application | Matching Bolt |
Hardened Flat Washer | ASTM F436 | Hardened carbon steel | Steel structures, bridges | A325 / A490 |
Flat Washer | DIN 125 | Carbon steel / Stainless | General assembly | DIN 931 / 933 |
Spring Lock Washer | DIN 127 | Carbon steel | Anti-vibration machinery | Hex bolts / Screws |
Structural Washer | DIN 6916 | High-strength steel | Heavy-duty structures | DIN 6914 |
4. Typical Application Scenarios
Steel structure buildings, high-rise frames, and bridge connections
Heavy machinery, equipment bases, and high-vibration systems
Highway guardrails, infrastructure, and power facilities
Automotive assembly, pipe supports, and industrial MRO
Construction, electrical installations, and mechanical engineering
5. Why Choose GTZL Washers?
Founded in 2001, professional manufacturer of structural fasteners
15,000 ㎡ modern factory with stable mass production capacity
Full-process inspection: hardness, load, dimension, and coating tests
Complete sizes in stock, supporting small orders & bulk projects
Compliant with international standards for global market access
Exported to Europe, North America, Australia, Middle East, Southeast Asia
24-hour quick response & on-time delivery guarantee
6. Conclusion
The launch of our ASTM F436 & DIN washer series further improves our one-stop structural fastening solution. With high hardness, stable quality, and full standard compliance, GTZL washers effectively enhance connection safety and service life for global engineering and industrial projects.
We will continue to focus on quality and reliability, providing safer and more durable fastening components for customers worldwide.
