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Lock Washer
Home / Products / Washer / Lock Washer / Internal Tooth Lock Washer
Lock Washer

Internal Tooth Lock Washer

Product Overview
The Internal Tooth Lock Washer features teeth oriented inward, making it ideal for use with small-diameter fasteners and applications requiring a low-profile appearance. Its serrated design bites into the fastener and surface to prevent rotational loosening.

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Zhejiang Chance & Union Import and Export Co., Ltd.
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Zhejiang Chance & Union Import and Export Co., Ltd.
Attributes
Zhejiang Chance & Union Import and Export Co., Ltd.

Key Features
Inward-facing teeth optimized for use with smaller fastener sizes.
Low-profile design suitable for applications with space constraints.
Creates strong friction to resist loosening from vibration and torque.
Available in various materials and finishes for corrosion protection.
Easy to install with standard tools for efficient assembly processes.

Product Features
Zhejiang Chance & Union Import and Export Co., Ltd.
Size Range M3–M36 / #4"–1 1/4" (custom sizes available)
Standards DIN 128 / DIN 6797 / ISO 10683 / Nord-lock style optional
Type Serrated lock washer (internal/external tooth) / split lock washer/wedge lock washer
Material Carbon Steel / Spring Steel / Stainless Steel 304 / 316
Surface Finish Plain / Zinc Plated / Black Oxide / Zinc Flake
Hardness HRC 30–45 (grade-dependent)
Operating Temperature  -40°C ~ 250°C (material-dependent)
Application  High-vibration environments, automotive, heavy machinery, structural joints
Applications
Zhejiang Chance & Union Import and Export Co., Ltd.

Applications
Electronic devices, small equipment assemblies, furniture manufacturing, and precision machinery.

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Zhejiang Chance & Union Import and Export Co., Ltd.
Zhejiang Chance & Union Import and Export Co., Ltd.
About Us
Fastening Chances,
Strengthening Union
Specializes in high-strength fasteners. We offer bolts, nuts, washers, and custom parts made from stainless steel, alloy steel, and more, serving over 200 clients in 25 countries. With 20 years of industry experience, we provide tailored fastening solutions from R&D to mass production.
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Zhejiang Chance & Union Import and Export Co., Ltd.
Certifications & Honors
Zhejiang Chance & Union Import and Export Co., Ltd.
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Utility Model Patent Certificate
Latest News & Updates
Stay informed with the latest industry trends, company news, and product innovations.
Zhejiang Chance & Union Import and Export Co., Ltd.
2026-05-26
Rooted in Manufacturing Heritage, Domestic Fasteners Expand Globally Steadily
With more than 20 years of mature manufacturing experience, China's fastener sector has established a sound technical and service system. Manufacturers provide high-strength bolts, nuts, screws, washers, pins and various non-standard customized parts. A wide range of materials, including stainless steel, alloy steel, aluminum alloy, copper and special alloys are adopted, together with advanced technologies such as cold heading, hot forging and precision machining. The products are exported to over 25 countries worldwide and serve more than 200 overseas clients, playing an important role in the global supply chain.
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Zhejiang Chance & Union Import and Export Co., Ltd.
2026-05-26
One-stop Fastener Solutions Connect Chinese Manufacturing with Global Markets
The global industrial sector has raised higher requirements for comprehensive services of supporting components. The fastener industry has upgraded its service model to cover the whole process from R&D and sampling to mass production, delivering one-stop supporting solutions for overseas customers. Supported by solid technical strength and strict quality control, the industry supplies highly stable and adaptable products, responds efficiently to customized demands worldwide, and builds a solid bridge linking Chinese manufacturing to the global market.
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Zhejiang Chance & Union Import and Export Co., Ltd.
2026-05-26
Diversified Materials and Exquisite Craftsmanship Build Core Competitiveness for Export Fasteners
Material selection and processing technology are the core guarantees for fastener quality. Domestic manufacturers keep optimizing material systems, including common metals and special alloys, and improve production techniques such as cold heading, hot forging and machining to ensure product strength, precision and durability. Both standard parts and complex non-standard customized parts comply with international industrial standards. Superior quality helps Chinese fasteners continuously expand influence across the global market.
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Zhejiang Chance & Union Import and Export Co., Ltd.
2026-05-26
Rising Overseas Demand Drives Sound Development of Fastener Foreign Trade
As global manufacturing, infrastructure and machinery industries recover, international demand for industrial fasteners keeps rising. Leveraging long-term industry experience, mature production systems and comprehensive after-sales services, China’s fastener foreign trade sector continues to expand overseas markets. Products are sold to many regions around the world with a growing customer base. The industry maintains steady order growth, fully demonstrating the strong market vitality and comprehensive strength of Chinese industrial products.
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Zhejiang Chance & Union Import and Export Co., Ltd.