304 Stainless Steel Flat Head Semi-Tubular Rivets M3-M6

Product Specification

304 SS Semi-Tubular Rivets - 180° Flat Head - 50% Hollow Ratio - Electronics & Sheet Metal - M3 to M6

Corrosion-resistant semi-tubular rivets with true flat head (180°). 304 stainless steel, 50% hollow body. Sizes M3x6mm to M6x20mm. Passivated finish. For appliances, furniture & electronics. Custom lengths/hollow ratios.

Engineered for **invisible fastening**, these **flat head semi-tubular rivets** feature an **180° countersunk head** (DIN 6797) that sits perfectly flush with surfaces. The **precision-controlled 50% hollow body** reduces installation force while maintaining high shear strength. Made from **A2-70 stainless steel (304)** with passivated finish, they resist corrosion in humid environments and prevent material cracking during setting.  

Primary Uses & Applications:

   - **Electronics**: Server chassis grounding, PCB shield mounting  
   - **Appliances**: Washing machine drum brackets, oven hinge pins  
   - **Furniture**: Sheet metal joints in cabinets, sliding mechanisms  
   - **Automotive**: Interior trim panels, sensor bracket fastening  
   - **Lighting**: Heat sink attachment in LED fixtures 

How to Use:

   1. **Drill Prep**:  
      - Drill hole = shank dia + 0.1mm (e.g., 4.1mm for M4 rivet)  
      - Deburr hole edges to prevent scratching  
   2. **Insert Rivet**:  
      - Place rivet through materials with head flush against surface  
      - Ensure materials clamped tightly (max gap 0.05mm)  
   3. **Tool Setup**:  
      - Use **semi-tubular rivet setter** with flat anvil (match head angle)  
      - Select punch diameter = 90% of hollow dia (e.g., 1.8mm for M4)  
   4. **Installation**:  
      - Apply steady pressure (M4: 800-1,000N)  
      - Bucktail should form 140-160° mushroom shape  
   5. **Inspection**:  
      - Verify head is fully seated (no gap)  
      - Bucktail diameter ≥ 1.5x shank dia (e.g., 6mm for M4)  

Our advantages: 

1. More than 20 years of screw production experience and non-standard screw custom development experience, provide you with cost-effective screws, and help you solve the fastener supply chain. 
2. Precise production equipment. The company introduces all imported equipment from Taiwan to produce precision screws and hardware accessories for you. Provide free sample testing for compatibility verification.
3. A complete management system, each batch of products that leave the factory undergoes multiple strict monitoring

4. Dedicated account management for seamless collaboration. System- supporting services guarantee you peace of mind.

Support and Services:
1. If you require technical support or have any questions regarding our Stainless Steel Rivet product, our team of knowledgeable professionals is here to assist you. We provide comprehensive support services for all aspects of our Stainless Steel Rivets. From selection advice to ensure you have the right type and size for your project, to guidance on proper installation techniques, we’ve got you covered.

2. Our support services include detailed product specifications, material safety data sheets, and step-by-step installation guides. We also offer troubleshooting assistance for any issues that may arise during the use of our Stainless Steel Rivets. Whether you're a seasoned professional or a DIY enthusiast, we're committed to providing the support you need to ensure your project's success.

3. For maintenance tips and best practices, our experts are on hand with valuable advice to extend the life and maintain the performance of our Stainless Steel Rivet. We are dedicated to providing exceptional customer support and ensuring that our products meet the highest standards of quality and reliability.

Packing and Shipping:
1. Our Stainless Steel Rivet are packaged with care to ensure they arrive at your location in perfect condition. Each pack contains a specific number of rivets, securely held within a durable, moisture-resistant plastic bag. This bag is then placed inside a sturdy cardboard box, cushioned with packing materials to prevent anymovement during transit.

2. The boxes are sealed and labeled with product information, including the quantity and size of the rivets, for easy identification. For larger or bulk orders, multiple boxes are placed onto a pallet, shrink-wrapped, and strapped securely to minimize the risk of damage.

3. We ship our Stainless Steel Rivets using reliable courier services to ensure timely and safe delivery. Tracking information is provided for every shipment, allowing you to monitor the progress of your order until it reaches your doorstep.

Our factory is able to accept customized drawings. To strike a balance between technical details and customer-centric messaging, please let us know if you need to tweak the description to highlight specific certifications or other parameters!