
Lock washers also known as locking washers is a mechanical anti-loosening fastener with flexibility and high strength with varying levels of vibration resistance. It is available in carbon steel, alloy steel and stainless steel.
The function of lock washer is to prevent bolts, screws and nuts from loosening in high vibration or shock environments. Compared to ordinary flat washers, lock washer reduce the risk of vibration loosening by more than 80%, and it provides friction or biting force through its own structure to “lock” bolts into place to avoid mechanical failure.
51Fasteners supplies a wide range of lock washers including internal/external tooth lock washers, serrated lock washers, double stack self-locking washers and more.
Specifications
- Customized
- International Standard
- Rugged and durable
- Good quality
Materials
- Stainless Steel
- Carbon Steel
- Alloy Steel
- Brass
- Silicon bronze
- Aluminum Alloy
- Nylon
Surface Treatments
- Black Oxide
- Natural Color Polishing
- Zinc plating
- Dacromet
- Nickel Plated
What Are the Standards for Lock Washer?
DIN 6907 | ASME B 18.21.1 | GB 861.2 | JIS B 1251 |
DIN 25201 | ASME B 18.21.2 | GB 862.2 | JIS B 1255 |
DIN 6798 | IFI 532 | GB 9074.28 | NF E 25-512 |
DIN 6797 | GB 956.1 | GB 956.2 | NF E 27-626 |
UNI 8841 | UNI 8842 | ASME B 18.21.2M | SAE J 489B |
Explore All Types of Lock Washer

External Tooth Lock Washer

Internal Toolth Lock Washer

Serrated Lock Washer

Double Fold Self-locking Washer
Applications
For high vibration, repetitive loads and high safety scenarios
- Construction machinery
- Equipment manufacturing
- Railway transportation
- Electrical equipment and control cabinets
- Wind energy
- Petrochemicals
- Commercial Vehicle and Truck Parts
- Medical Appliances
Our Processing and Service Capabilities
51Fasteners is a professional manufacturer and exporter of industrial fasteners. We provide high-precision lock washer in various vibration-resistant grades and support global logistics to help your industrial projects run efficiently.
- Customized size and structure
- Special materials
- Surface treatment
- Comprehensive test report (size, tolerance, surface treatment, salt spray test, etc.)
- Flexible MOQ supports bulk purchase and small batch samples
If you are looking for cost-effective lock washer for your project, why not contact 51fasteners for samples and solution suggestions? Whether you are an equipment manufacturer, hardware distributor, or general contractor, 51fasteners can provide professional support for your lock washer procurement!