ASME B18.21.1 304 Stainless Steel Internal Tooth Lock Washer
ASME B18.21.1 304 stainless steel internal tooth lock washer is a high-performance locking fastener designed to prevent loosening caused by vibration, dynamic loads, and repeated movement in bolted assemblies. The ASME B18.21.1 304 stainless steel internal tooth lock washer features inward-facing serrated teeth that bite into the bearing surface and the fastener head, creating increased friction and maintaining preload for secure fastening.
Manufactured from premium 304 stainless steel, the ASME B18.21.1 304 stainless steel internal tooth lock washer offers excellent corrosion resistance, reliable elastic performance, and long service life. It is widely used in electrical equipment, electronics, automotive components, machinery, renewable energy systems, marine equipment, food processing machinery, and OEM manufacturing.
Product Overview
The ASME B18.21.1 304 stainless steel internal tooth lock washer is engineered to improve fastening reliability while minimizing the space required beneath the fastener head. The internal teeth remain concealed under the bolt or screw head, making it suitable for applications where appearance is important or where the outer diameter must remain compact.
Compared with external tooth lock washers, the ASME B18.21.1 304 stainless steel internal tooth lock washer provides excellent locking performance in light to medium-duty assemblies while reducing the risk of damage to surrounding components.
As a precision industrial fastener, it is commonly paired with stainless steel hex bolts, socket head cap screws, machine screws, and OEM fasteners across various industries.
Product Specifications
| Item | Description |
|---|---|
| Standard | ASME B18.21.1 |
| Product Name | ASME B18.21.1 304 Stainless Steel Internal Tooth Lock Washer |
| Material | 304 Stainless Steel |
| Washer Type | Internal Tooth Lock Washer |
| Tooth Design | Internal Serrated Teeth |
| Compatible Fasteners | Bolts, Machine Screws, Socket Head Screws |
| Inner Diameter Range | #2 – 1″ / M2–M24 (Custom Available) |
| Outer Diameter | According to ASME B18.21.1 |
| Surface Finish | Natural Stainless Steel / Passivated |
| Strength Grade | 304 Stainless Steel |
| Packaging | Bulk Carton, Poly Bag, OEM Packaging |
| Customization | Dimensions, thickness, material, packaging, marking |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥515 MPa |
| Yield Strength | ≥205 MPa |
| Hardness | HV 150–220 |
| Density | 7.93 g/cm³ |
| Corrosion Resistance | Excellent |
| Operating Temperature | -196°C to 400°C |
| Elastic Performance | Excellent spring recovery |
| Manufacturing Standard | ASME B18.21.1 |
Materials and Manufacturing Process
The ASME B18.21.1 304 stainless steel internal tooth lock washer is manufactured through precision stamping and heat treatment processes to ensure consistent locking performance and dimensional accuracy.
- Premium 304 stainless steel sheet selection
- Precision progressive die stamping
- Internal tooth forming with high-accuracy tooling
- Deburring to eliminate sharp edges and burrs
- Solution annealing when required
- Surface passivation to improve corrosion resistance
- Ultrasonic cleaning to remove contaminants
- Elasticity and dimensional verification
- Final inspection and export-grade packaging
Every ASME B18.21.1 304 stainless steel internal tooth lock washer is manufactured under strict ISO quality management procedures to ensure consistent performance and reliable quality.
Applications of the Product
ASME B18.21.1 304 stainless steel internal tooth lock washers are widely used in:
- Electrical equipment and control panels
- Consumer electronics
- Automotive electrical systems
- Renewable energy equipment
- Marine equipment
- Food processing machinery
- Medical devices
- Industrial automation equipment
- Manufacturing systems
- OEM assembly lines
Their compact locking design makes them particularly suitable for assemblies where limited installation space or a clean appearance is required.
Why Choose This Product
- Premium 304 stainless steel material
- Manufactured according to ASME B18.21.1
- Excellent corrosion resistance
- Reliable anti-loosening performance
- Compact internal tooth design
- Strong elastic recovery
- Long service life
- Suitable for automated assembly
- Bulk supply capability
- OEM and ODM customization support
- Fast global delivery
The ASME B18.21.1 304 stainless steel internal tooth lock washer provides dependable locking performance for industrial, electrical, and precision mechanical assemblies.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and precision washer solutions for global customers.
Our strengths include:
- Advanced precision stamping production lines
- Comprehensive stainless steel manufacturing capabilities
- Large inventory and flexible production scheduling
- OEM and ODM customization services
- Professional engineering support
- Strict ISO quality management system
- Extensive export experience
- Reliable global supply chain and technical consultation
Flybear supplies high-quality fastening solutions for OEM manufacturers, distributors, EPC contractors, and industrial buyers worldwide.
Quality Inspection and Control
Each production batch undergoes strict quality inspection, including:
- Chemical composition analysis
- Tensile strength testing
- Hardness testing
- Salt spray corrosion testing
- Tooth geometry inspection
- Dimensional inspection
- Surface finish inspection
- Elasticity testing
- Packaging inspection
All manufacturing processes comply with ISO quality management standards to ensure stable product quality.
Selection Guide
When selecting an ASME B18.21.1 304 stainless steel internal tooth lock washer, consider:
- Fastener diameter
- Washer size and thickness
- Material compatibility
- Required locking force
- Indoor or outdoor environment
- Corrosion level
- Electrical conductivity requirements
- Assembly space limitations
Choosing the correct washer improves preload retention, vibration resistance, and fastening reliability.
FAQ
1. What is an internal tooth lock washer?
It is a lock washer with inward-facing teeth that increase friction between the fastener and the mating surface to resist loosening.
2. What is the difference between internal and external tooth lock washers?
Internal tooth lock washers have teeth inside the inner diameter for a cleaner appearance and smaller outside diameter, while external tooth lock washers generally provide greater locking force.
3. Is 304 stainless steel corrosion resistant?
Yes. 304 stainless steel provides excellent corrosion resistance for most indoor, outdoor, and humid environments.
4. Can custom sizes be manufactured?
Yes. Flybear offers OEM and ODM production for custom dimensions, materials, thicknesses, and packaging.
5. How can I request a quotation?
Please provide the washer size, quantity, material requirements, drawings (if available), and application details for a fast quotation.
The ASME B18.21.1 304 stainless steel internal tooth lock washer provides reliable anti-loosening performance, excellent corrosion resistance, and precision manufacturing for demanding industrial fastening applications.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
For quotations, customization, and technical support, please Contact Us.
