Product Overview

Product Name: Galvanized Lock Washers, External Tooth / Internal Tooth Lock Washers, Retaining Washers
Standards: DIN 6797 (External Tooth), DIN 6798 (Internal Tooth)
Material: 65Mn spring steel / high-quality carbon steel
Surface Treatment: Electrogalvanized (blue-white zinc / colored zinc)
Structure: Features a multi-tooth anti-slip washer that prevents loosening through tooth engagement

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Applications

Fastening of electronic and electrical equipment, enclosures, and instrumentation
Anti-loosening for motors, fans, pumps, and transmission equipment
Assembly of automobiles, agricultural machinery, and small mechanical equipment
Anti-slip and anti-loosening for thin sheets, plastic parts, and aluminum alloy components
General-purpose structures requiring high resistance to vibration-induced loosening

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Standard Size Chart (mm)

Specifications	Inner Diameter d	Outer Diameter D	Thickness t
M3	3.2	7	0.4
M4	4.3	9	0.5
M5	5.3	10	0.5
M6	6.4	12	0.6
M8	8.4	16	0.8
M10	10.5	20	1.0
M12	13.0	24	1.2
M14	15.0	28	1.2
M16	17.0	30	1.5

How to Store Flat Washers

The Function of Flat Washers

Flat washers are components used to prevent bolts and nuts from seizing. They are used wherever fasteners are employed, but what exactly is their purpose? Flat washers are a type of washer whose primary function is to increase the contact area between screws and large equipment and to enhance the clamping force. When using flat washers, they are typically used in conjunction with nuts. To ensure they remain effective for the longest possible time, keep the following points in mind:

1. In harsh environments, flat washers should be sealed to prevent leakage under specific temperature and pressure conditions during operation.

2. When connecting the flat washer to the contact surface, ensure optimal sealing performance to achieve the desired results.

3. When under pressure and subject to temperature changes, the washer must possess good wrinkle resistance; otherwise, it may damage the screw and cause gas leakage.

Customization Process

1. Requirement Consultation: Provide drawings (CAD/PDF), samples or detailed specs (dimensions, material, strength, surface treatment, quantity)

2. Proposal & Quotation: Technical proposal and accurate quote within 24 hours; confirm lead time and sample requirements

3. Sample Approval: Samples ready in 3–7 days; free samples provided for your inspection

4. Mass Production: Proceed with production after sample approval; full production progress tracking

5. QC & Packaging: Full-process quality control; third-party inspection reports (SGS, BV, etc.); export-standard packaging

6. Delivery: Arrange sea / air / express delivery to your designated port or warehouse

Our Customization Advantages

Professional Team: Over 10 years of fastener customization experience; proficient in GB / DIN / ISO / ASTM standards
Flexible MOQ: Negotiable minimum order quantity for non-standard parts; volume discounts for large orders
Quality Assurance: Full-process QC system, traceable raw materials, compliant with international quality standards
Stable Lead Time: Mature supply chain; rush orders accepted to meet project schedules
Foreign Trade Support: Complete export documentation; payment terms including T/T, L/C for global customers