GB5287 Flat Washer Extra Large – 100HV Hardness, Product Grade C
Price:
Negontiation
MOQ:
50000
Delivery Time:
7-25Days
Brand:
YONGBIAO
Product Description
GB5287 Flat Washer Extra Large – 100HV Hardness, Product Grade C
The GB5287 Extra Large Flat Washer (also known as Plain Washer - Extra Large Series - Product Grade C) is a high-quality fastener component manufactured in strict accordance with Chinese National Standard GB/T 5287-2002 (equivalent to ISO 7094:2000). This standard specifies plain washers with nominal sizes (thread major diameters) ranging from 5mm to 36mm, featuring an extra large series design, 100HV hardness grade, and Product Grade C classification.
Key Features
- Extra Large Outer Diameter: Compared to standard flat washers, the GB5287 series features a significantly larger outside diameter, providing a larger bearing surface to effectively distribute load and prevent damage to the fastened structure
- High Hardness (100HV): Manufactured to 100HV hardness grade, ensuring excellent strength and durability under heavy loads
- Versatile Material Options: Available in carbon steel, stainless steel (304/316), and alloy steel to meet different environmental and strength requirements
- Multiple Surface Finishes: Options include plain, zinc plated, black oxide, phosphate, hot-dip galvanized, and Dacromet coatings for enhanced corrosion resistance
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
Contact Us
Email: rainting@ybfasteners.com
Product Images
Packaging Options
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
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
NINGBO YONGBIAO FASTENER CO.,LTD
Location
No.1 Lufeng Industrial Park, Wuxiang Town, Yinzhou District, Ningbo City, Zhejiang, China
Contact Person
Amylin