Phone
Send Email
whatsapp
Facebook
Youtube
Hot Products
0102030405
China Spring Washers Suppliers | Factory Direct Split Lock & Helical Spring Washers for Fasteners
Product Overview
| Product Name | Carriage Bolt (Round Head Square Neck Bolt) |
| Standards | DIN 603, ASME B18.5, ISO 8677, or customized |
| Material | Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel |
| Grade | 4.8, 6.8, 8.8, 10.9, A2-70, A4-80 |
| Surface Finish | Zinc Plated (Blue / Yellow), Hot Dip Galvanized (HDG), Black Oxide, Dacromet / Ruspert, Plain / Oiled |
| Thread Type | Full Thread / Partial Thread, Metric / UNC / UNF |
| Size Range |
Metric: M5 – M24, Length 10mm – 300mm Inch: 1/4" – 1", Length 3/4" – 12" Customized sizes available |
Product Features
Helical shape creates spring tension for anti-loosening
Maintains preload in bolted joints under dynamic conditions
Designed to bite into bearing surface and mating fastener
Suitable for medium-duty locking performance
Easy to install and compatible with standard bolts/nuts
Available in light, medium, and heavy series
Applications
Automotive
Automotive and machinery assembly
Electrical
Electrical equipment and appliances
Industrial
Industrial machines and tools
Construction
Construction and steel structure connections
Renewable
Renewable energy and wind power installations
Other
Vibration-prone equipment and bolted assemblies
Packaging & Delivery
| Packaging |
Bulk in cartons and wooden pallets Small boxes, plastic bags, or customized packaging |
| Lead Time | 7–30 days based on quantity and order specs |
| Shipping Port | Tianjin Port, China |
Why Choose Hebei Chudu
- Over a decade of expertise in washer and fastener production
- Strict quality control with ISO 9001 certification
- Full product range: spring, flat, fender, sealing, and custom washers
- Fast response, stable supply, and competitive pricing
- OEM/ODM supported with custom materials and surface treatments
- Export experience with customers in 40+ countries
Frequently Asked Questions
What standard specifications do your carriage bolts follow?
Our carriage bolts are manufactured in strict compliance with standard specifications including DIN 603, ASME B18.5, and ISO 8677. Custom standard configurations are also available upon request.
What materials and grades are available for your fasteners?
We supply fasteners in Carbon Steel, Stainless Steel (such as SS304 and SS316), and Alloy Steel. Available grades range from 4.8, 6.8, 8.8, and 10.9 to stainless steel specifications like A2-70 and A4-80.
What surface finishes do you provide?
We offer a comprehensive range of surface treatments including blue or yellow Zinc Plating, Hot Dip Galvanizing (HDG), Black Oxide, Dacromet, Ruspert, and plain/oiled finishes to ensure optimal corrosion resistance.
What is the typical lead time and shipping port for orders?
Our standard lead time ranges between 7 to 30 days, depending on the order quantity and specific requirements. All shipments are primarily dispatched from Tianjin Port, China.
Do you support OEM/ODM and custom packaging?
Yes, we fully support OEM/ODM requirements. We can customize materials, sizes, and surface treatments, as well as provide customized packaging options such as specific small boxes, plastic bags, or bulk packaging on wooden pallets.
What makes your helical spring washers effective against loosening?
Our helical spring washers feature a split design that creates spring tension to resist loosening under vibration. They are engineered to bite into the bearing surface and mating fasteners, maintaining dynamic preload in bolted joints.