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Stainless Steel Semi Tubular Rivets
Product Overview
Semi tubular rivets are cold-formed from austenitic stainless steels 304 (A2) and 316 (A4). The partially hollow shank design reduces setting force while maintaining structural integrity. The semi-tubular configuration provides a balance between material displacement and mechanical strength, making these rivets suitable for applications where a solid rivet would require excessive force. Passivation per ASTM A967 removes free iron and restores the passive layer. Dimensional tolerances follow ISO 14589 and DIN 7338, with full material traceability.
Key Features
- Reduced setting force compared to solid rivets.
- Corrosion resistance from chromium oxide passive film.
- Consistent clinching and flaring in various materials.
- Available in multiple head styles and finishes.
- Suitable for automated riveting systems.
| Attribute | Specification |
| Material grades | 304 (A2), 316 (A4), 410 (martensitic, optional) |
| Tube diameter range | 2 mm – 10 mm (custom up to 14 mm) |
| Shank length range | 4 mm – 28 mm |
| Head styles | Flat, round, countersunk, flange, large flange |
| Surface treatments | Passivation, zinc plating, wax coating, PTFE |
| Standards | ISO 14589, DIN 7338, custom specifications |
| Hardness (as-supplied) | 70 – 95 HRB (austenitic), 100 – 110 HRB (martensitic) |
Automotive
- Brake pad assemblies
- Clutch friction linings
- Interior trim attachments
Electronics
- Enclosure fastening
- Heat sink mounting
- PCB standoff riveting
Light Industrial
- Luggage and cases
- Leather goods and belts
- Canvas and tent structures
Use a rivet setting tool with a concave anvil to properly flare the semi-tubular shank. Recommended hole clearance: 0.05 – 0.15 mm over tube O.D. For harder materials, pre-drill with deburring to avoid shank distortion. Setting force varies with tube diameter and material hardness; perform trial sets to determine optimal pressure. For stainless steel, use lubricated setting tools to reduce galling.
Frequently Asked Questions
Production & Customization
Chance & Union utilizes cold heading and deep drawing processes to produce stainless steel semi-tubular rivets in both standard and custom dimensions. We offer material selection support, prototype development, and high-volume production with full quality control per ISO 9001. Custom finishes, special hardness levels, and non-standard head geometries are available. Our engineering team can assist with design modifications for specific assembly requirements.
Storage & Handling
- Store in a clean, dry area with relative humidity below 55% to maintain passivation.
- Avoid contact with carbon steel, copper, or graphite to prevent galvanic corrosion or contamination.
- Use plastic or coated containers; separate by grade, size, and length.
- Implement FIFO rotation; recommended shelf life up to 36 months in original packaging.
- Inspect for rust spots or discoloration before use; re-passivate if necessary.
Leveraging the factory's robust R&D and production capabilities, we specialize in high-strength rivets bolts, nuts, washers, pins, screws, and various non-standard custom parts. As experienced Custom Stainless Steel Semi Tubular Rivets Suppliers, we provide flexible manufacturing solutions for different customer requirements. Our product range covers materials including stainless steel, alloy steel, aluminum alloy, copper, and special alloys, utilizing processes such as cold heading, hot forging, and CNC machining. Our products are exported to over 25 countries, serving more than 200 clients.
Chance & Union is committed to seamlessly connecting "Manufactured in China" with the international market, providing global customers with one-stop fastening solutions from R&D to mass production through professional technology and exceptional quality.
