Expansion Rivet Nuts
Riveting nuts that plastically deform to form a tight fit with the base material — simple process, moderate connection strength, suited to height-restricted joints and low-torque fastening in sheet metal.
Last updated: 2026-11
Specifications
Expansion rivet nuts work by a different principle from threaded inserts for plastics or machined reinforcement: during the riveting process the nut-part material is plastically deformed by external force to form a tight fit with the base material, achieving the connection. The collected source characterizes the family plainly — a relatively simple process and moderate connection strength, especially suitable for scenarios where there are restrictions on the height of the fasteners and the torque is not large — with flexible, changeable characteristics that meet connection needs across sheet-metal processing. Like rivet nuts generally, they install from one side of the component: the installation tool pulls or compresses the insert so its body deforms on the blind side, creating a mechanical clamping section while leaving the internal thread available — the one-side installation that makes them useful for hollow sections and fabricated assemblies where the rear side is inaccessible. Specifiers should match the moderate-strength profile to the joint: where connection requirements exceed moderate strength, the collected source's selection rule is to weigh material properties, connection requirements and installation environment across the riveting options.
| Working principle | During riveting, the nut-part material is plastically deformed by external force to form a tight fit with the base material (collected source, verbatim basis) |
|---|---|
| Process character | Relatively simple process; moderate connection strength (collected source) |
| Sweet-spot conditions | Especially suitable for scenarios with restrictions on fastener height and where torque is not large (collected source, verbatim basis) |
| Domain | Sheet-metal processing; flexible sizing meets connection needs across different occasions (collected source) |
| Installation direction | One-side (blind) installation: tool pulls/compresses the insert so the body deforms on the blind side, leaving the internal thread available for the fastener (rivet-nut installation reference) |
| Installation matching | Hole diameter, material thickness, grip range and installation tooling must be matched to the insert specification to retain without deforming the surrounding component |
| Selection rule | Weigh material properties, connection requirements and installation environment across riveting options; beyond-moderate-strength joints need the heavier options, not this subtype |
| MOQ / lead time | Not owner-confirmed for this family — confirmed at quotation |
Materials
- Steel and stainless as common rivet-nut materials per the collected sources; confirm required material on the RFQ (the expansion-rivet-nut source describes working principle, not a material table)
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (Expansion Rivet Nuts) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantities and lead times for this family are confirmed at quotation — send your sizes, grades and quantities on the RFQ and the quote will carry a firm schedule. Sample availability is confirmed with the quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
Expansion rivet nut or self-clinching nut for a sheet-metal enclosure?
The collected comparison separates them by mechanism and duty: self-clinching nuts cold-flow the sheet into a groove for strong reusable threads, while expansion rivet nuts plastically deform for a tight fit with moderate connection strength — and earn their place where fastener height is restricted and torque is not large. High-torque joints in thick-enough sheet point to self-clinching; height-limited low-torque points point to the expansion type.
Can expansion rivet nuts be installed into closed sections?
One-side (blind) installation is the family's defining convenience: the tool deforms the insert body on the blind side of the material, so hollow sections and assemblies with inaccessible rear sides are the standard cases. The hole diameter, material thickness and grip range must match the insert specification so retention holds without deforming the component.
What should an RFQ for expansion rivet nuts state?
State the internal thread size and pitch, sheet material and thickness, grip range, head style if height-restricted, the torque the joint will see (the type suits low torque per the collected source), and quantity per size. Commercial terms are confirmed at quotation.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support