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{"title":"DIN137A Curved Spring Washer Carbon Steel Black Oxide Finish M2-M36 High Quality","imgUrl":"https:\/\/img.chinax.com\/nimg\/f5\/56\/a171e9dd538ecdf5934a4cd41773-200x200-1\/din137a_curved_spring_washer_carbon_steel_black_oxide_finish_m2_m36_high_quality_factory_direct.jpg","attrs":{"Sample":"Free Samples","Model Number":"washer","Connection":"Common Bolt","Minimum Order Quantity":"50000"}}
{"title":"DIN137B Wave Spring Washer 65Mn Spring Steel Mechanically Zinc Plated Curved","imgUrl":"https:\/\/img.chinax.com\/nimg\/0f\/5f\/8f6d28859dfca88753d593bd03a5-200x200-1\/din137b_wave_spring_washer_65mn_spring_steel_mechanically_zinc_plated_curved_disc_washer.jpg","attrs":{"Usage":"For Fastening Metal To Metal","Model Number":"washer","Connection":"Common Bolt","Place Of Origin":"ZHEJIANG CHINA"}}
{"title":"Stainless Steel DIN137 Saddle Spring Washer SS304 A2 Type A Curved Lock Washer","imgUrl":"https:\/\/img.chinax.com\/nimg\/d4\/0a\/3ae8de2ea0cdcfb5a9348042446f-200x200-1\/stainless_steel_din137_saddle_spring_washer_ss304_a2_type_a_curved_lock_washer_for_anti_loosening.jpg","attrs":{"Usage":"For Fastening Metal To Metal","Model Number":"washer","Connection":"Common Bolt","Place Of Origin":"ZHEJIANG CHINA"}}
{"title":"High Strength DIN137A Domed Spring Washer Carbon Steel 45# HRC44-51 Yellow Zinc","imgUrl":"https:\/\/img.chinax.com\/nimg\/c8\/03\/1853bc5bad159ea0c1135180bb8c-200x200-1\/high_strength_din137a_domed_spring_washer_carbon_steel_45_23_hrc44_51_yellow_zinc_plated.jpg","attrs":{"Usage":"For Fastening Metal To Metal","Model Number":"washer","Connection":"Common Bolt","Place Of Origin":"ZHEJIANG CHINA"}}
{"title":"Stainless Steel Single Ear Locking Washer Non-Rust","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/2c\/891060559da82b91e9742803f3d0-200x200-1\/stainless_steel_single_ear_locking_washer_non_rust.jpg","attrs":{"Brand Name":"YONGBIAO","Model Number":"Cross Tapping Screw","Certification":"ISO 9001","Place of Origin":"China"}}
{"title":"Wholesale Single Ear Tab Washer Various Surface Treatment Available","imgUrl":"https:\/\/img.chinax.com\/nimg\/26\/68\/dc73b71dcbcf05dc4314953207fd-200x200-1\/wholesale_single_ear_tab_washer_various_surface_treatment_available.jpg","attrs":{"Brand Name":"YONGBIAO","Model Number":"Cross Tapping Screw","Certification":"ISO 9001","Place of Origin":"China"}}
The DIN137 Saddle Spring Washer (also known as Curved Spring Washer or Domed Spring Washer) is a high-quality German-standard fastening component designed to prevent bolt and nut loosening under vibration and dynamic loads.
Key Features
Excellent Anti-Loosening Performance - The curved/wave design provides consistent spring force that maintains preload between bolted connections, effectively preventing loosening caused by vibration and shock loads
Superior Material Quality - Made from quenched and tempered spring steel (65Mn/50CrV4) or high-grade stainless steel, delivering hardness of HRC 40-51 and reliable elastic recovery
Wide Application Range - Suitable for automotive, machinery, construction, electronics, aerospace, railway, marine, and food processing industries
Multiple Finishes - Available in plain, black oxide, zinc plated (yellow/blue-white), Dacromet, and custom colors to meet various environmental and aesthetic requirements
Corrosion Resistance - Stainless steel A2/A4 options provide excellent resistance to rust and corrosion in marine, chemical, and outdoor environments
Technical Specifications
Measurement System
INCH, Metric
Standard
DIN, ANSI, GB, JIS, BSW, GOST
Process
Cold Forging
Finish
Zinc Plated
Load Capacity
Medium Duty
Usage
For Fastening Metal To Metal
HS Code
7318151001
Customization Services
We offer comprehensive OEM and ODM services to meet your specific requirements:
Custom head styles, drive types (Phillips H / Pozidriv Z), and thread designs
Special lengths, diameters, and tolerances
Specific material grades and surface finishes
Custom packaging with your branding (labels, boxes, bags, blister packs)
Logo engraving on screw heads
Why Choose Us
Professional fastener manufacturer with over 10 years of export experience
Advanced automatic cold heading and thread rolling equipment ensuring consistent quality and fast delivery
Strict quality control system from raw material sourcing to finished product
Competitive factory-direct pricing with no middlemen
Responsive customer service and technical support
Flexible MOQ to accommodate both trial orders and bulk shipments
Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. Custom packaging configurations are available upon request. Small cartons are consolidated into larger master cartons for secure transportation. Palletized units are wrapped with waterproof film and reinforced with packaging straps, with custom shipping marks available.
Packaging Images
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2012
Total Annual:
5000000-6000000
Employee Number:
45~53
Ecer Certification：
Verified Supplier
Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work... Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work...
