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HANDAN HAOSHENG FASTENER CO., LTD.
Color Zinc Coated DIN 125 Flat Washers

Our Color Zinc Coated DIN 125 Flat Washers are precision-engineered components designed to provide reliable load distribution, surface protection, and vibration absorption in bolted assemblies. Manufactured in strict accordance with the German DIN 125 standard, these washers feature a distinctive colored zinc finish that combines the dimensional accuracy and strength of a standard flat washer with enhanced corrosion resistance and visual appeal. The vibrant color coating not only protects against rust but also allows for easy identification, quality control, and aesthetic matching in visible applications. Ideal for general engineering, automotive, construction, and assembly applications where both performance and appearance matter.

  • Description

Product Details


Name

Flat Washer

Materials

Carbon Steel(Q235/45#)

Standard

DIN125

Strength level

100HV 140HV 200HV 300HV

Size

Φ1.7-Φ165

Surface finish

 ZP/YZP/Black/HDG/Dacromet etc.

Length

/

Samples

Available


Product Parameters


SizeΦ1.7Φ1.8Φ2.2Φ2.5Φ2.7Φ2.8Φ3.2Φ3.7Φ4.3Φ5.3Φ6.4Φ7.4Φ8.4Φ10.5Φ13
MFor thread sizeM1.6M1.7M2M2.3M2.5M2.6M3M3.5M4M5M6M7M8M10M12
dmin=nominal size1.71.82.22.52.72.83.23.74.35.36.47.48.410.513
max1.841.942.342.642.842.943.383.884.485.486.627.628.6210.7713.27
dcmin=nominal size44.55667789101214162024
max3.74.24.75.75.76.646.647.648.649.6411.5713.5715.5719.4823.48
hNominal Size0.30.30.30.50.50.50.50.50.811.61.61.622.5
max0.350.350.350.550.550.550.550.550.91.11.81.81.82.22.7
min0.250.250.250.450.450.450.450.450.70.91.41.41.41.82.3
per 1000 units ≈ kg0.0240.0310.0370.0920.0880.1270.1190.1550.3080.4431.021.391.833.576.27

SizeΦ15Φ17Φ19Φ21Φ23Φ25Φ27Φ28Φ29Φ31Φ33Φ34Φ36Φ37Φ39
MFor thread sizeM14M16M18M20M22M24M26M27M28M30M32M33M35M36M38
dmin=nominal size151719212325272829313334363739
max15.2717.2719.3321.3323.3325.3327.3328.3329.3331.3933.6234.6236.6237.6239.62
dcmin=nominal size283034373944505050566060666672
max27.4829.4833.3836.3838.3843.3849.3849.3849.3855.2658.858.864.864.870.8
hNominal Size2.533334444455556
max2.73.33.33.33.34.34.34.34.34.35.65.65.65.66.6
min2.32.72.72.72.73.73.73.73.73.74.44.44.44.45.4
per 1000 units ≈ kg8.6211.314.717.218.332.343.742.340.953.677.475.394.392.1136

SizeΦ40Φ41Φ43Φ46Φ50Φ52Φ54Φ57Φ58Φ60Φ62Φ66Φ70Φ74Φ78
MFor thread sizeM39M40M42M45M48M50M52M55M56M58M60M64M68M72M76
dmin=nominal size404143465052545758606266707478
max40.6241.6243.6246.6250.6252.7454.7457.7458.7460.7462.7466.7470.7474.7478.74
dcmin=nominal size72727885929298105105110110115120125135
max70.870.876.883.690.690.696.6103.6103.6108.6108.6113.6118.6123.4133.4
hNominal Size667788899999101010
max6.66.6889991010101010111111
min5.45.46677788888999
per 1000 units ≈ kg133130183220294284330431425472458492586626749

SizeΦ82Φ87Φ93Φ98Φ104Φ109Φ114Φ119Φ124Φ129Φ134Φ139Φ144Φ149Φ155Φ165
MFor thread sizeM80M85M90M95M100M105M110M115M120M125M130M135M140M145M150M160
dmin=nominal size82879398104109114119124129134139144149155165
max82.8787.8793.8798.87104.87109.87114.87119.87125130135140145150156166
dcmin=nominal size140145160165175180185200210220220230240250250250
max138.4143.4158.4163.4173.4178.4183.15198.15*208.15218.15218.15228.15238.15248.15248.15248.15
hNominal Size12121212141414141616161618181818
max13.213.213.213.215.215.215.215.217.217.217.217.219.219.219.219.2
min10.810.810.810.812.812.812.812.814.814.814.814.816.816.816.816.8
per 1000 units ≈ kg95399612501300171017701830223028303130300033104090447042703910

Key Features & Benefits


●Precision Load Distribution: The broad, flat surface area effectively distributes clamping force from the bolt head or nut across a wider area of the mating material, preventing surface damage, reducing embedding, and ensuring a more secure, stable joint.

●Surface Protection: Creates a protective barrier between the rotating fastener and the workpiece, preventing galling, marring, and surface abrasion during installation and under vibration.

●Corrosion-Resistant Color Zinc Coating: The specialized zinc plating provides excellent protection against rust and corrosion, significantly extending service life in indoor and mildly exposed environments. The distinctive blue, yellow, or other colors add a layer of visual quality control and aesthetic finish.

●DIN 125 Dimensional Accuracy: Manufactured to strict DIN 125 tolerances, ensuring consistent inner diameter (ID), outer diameter (OD), and thickness for perfect fit with corresponding metric bolts and nuts.

●Chamfered Edge Design: Precision chamfered edges eliminate sharp burrs, ensuring smooth installation, safe handling, and consistent performance.

●Vibration Dampening: Adds a small degree of spring and friction in the joint, helping to absorb minor vibrations and reduce the risk of fastener loosening over time.

●Visual Identification & Quality Control: The colored finish makes it easy to verify that washers are installed, distinguish between sizes or batches, and inspect for proper assembly.


Intended Applications


Color Zinc Coated DIN 125 Washers are versatile components used across numerous industries:

●General Manufacturing & Assembly: Load distribution and surface protection in machinery, equipment, and product assembly.

●Automotive & Transportation: Used in vehicle assembly, engine components, chassis, and interior fittings where corrosion resistance and appearance matter.

●Construction & Steelwork: For bolted connections in metal framing, handrails, brackets, and building services installations.

●Furniture & Joinery: In visible furniture assemblies, shelving systems, and decorative fittings where the colored finish complements the design.

●Electronics & Enclosures: Protecting delicate surfaces and distributing load in control panels, server racks, and electrical enclosures.

●DIY & Home Improvement: Ideal for visible home projects, repairs, and assemblies where a neat, finished appearance is desired.

●Maintenance, Repair & Operations (MRO): The go-to washer for service and repair work requiring corrosion-resistant components.


Installation & Torque Guidelines


1.Select Correct Size: Choose a washer where the inner diameter (ID) matches the nominal bolt size (e.g., M8 washer for M8 bolt). The ID should be slightly larger than the bolt diameter for easy installation.

2.Position Correctly: Place the washer between the fastener (bolt head or nut) and the workpiece surface.

3.Multiple Washers: Generally, use only one washer per fastener. Stacking washers is not recommended as it can reduce joint integrity.

4.Inspect Surface: Ensure both the washer and workpiece surfaces are clean and free of debris for optimal load distribution.

5.Tighten Normally: Apply torque as specified for the bolt/nut assembly. The washer will seat under load.


Why Choose Our Color Zinc Coated DIN 125 Washers?


●Authentic Standard Compliance: Our washers are manufactured to genuine DIN 125 specifications, ensuring reliable fit and performance every time.

●Superior Corrosion Protection: The color zinc coating offers enhanced durability compared to plain or standard zinc finishes, providing long-lasting protection.

Aesthetic Versatility: The range of color options allows for design coordination, visual coding, or simply a more finished appearance in visible applications.

Consistent Quality: Rigorous quality control ensures uniform dimensions, clean edges, and consistent coating thickness across every batch.

Complete Size Availability: We stock a comprehensive range of metric sizes to meet all your project requirements, from small prototypes to large production runs.

Competitive Value: High-quality, standards-compliant washers at prices that make sense for both small users and volume buyers.


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