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0102030405
China Split Lock Washers, Helical Spring Washers - Reliable Suppliers & Factory for Quality Spring Washers
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 standards do your Carriage Bolts comply with?
Our carriage bolts are manufactured in compliance with standard specifications including DIN 603, ASME B18.5, and ISO 8677. Custom options are also available.
What materials and grades are available for your fasteners?
We supply fasteners in Carbon Steel, Stainless Steel (SS304, SS316), and Alloy Steel, covering grades 4.8, 6.8, 8.8, 10.9, A2-70, and A4-80.
How do spring washers prevent bolted joints from loosening?
The helical shape of the spring washer creates continuous spring tension under compression, which helps maintain preload and prevents loosening in dynamic or vibrating conditions.
What are the primary applications of these fasteners?
They are widely used in automotive assembly, electrical equipment, industrial machinery, steel structure construction, renewable energy (like wind power), and other vibration-prone environments.
What packaging options and shipping terms do you offer?
We provide bulk packaging in cartons and wooden pallets, small boxes, plastic bags, or custom options. Shipments are dispatched from Tianjin Port, China, with a standard lead time of 7 to 30 days.
What customization services does Hebei Chudu support?
We offer full OEM/ODM support, allowing customization of materials, sizes, and surface treatments (such as hot-dip galvanizing, zinc plating, or black oxide) to meet your specific requirements.