closed end rivet nuts Supplier
As an experienced supplier of closed-end rivet nuts in China, we provide both standard and custom products to customers worldwide. The closed-end design of these rivet nuts prevents dust and water from entering the bottom of the threads and reaching the assembly area. They are particularly suitable for industrial applications that require dust and moisture protection, internal protection, and long-term connection stability.
- Closed-end rivet nuts offer better dust and moisture resistance than open-end rivet nuts.
- Enhance long-term connection stability.
- Suitable for a wide range of industrial applications.
Why Choose Our closed end rivet nuts
- Closed-end design reduces the ingress of moisture and dust.
- High-speed, reliable and low-cost.
- High-quality and high-load capacity thread.
- Not rivet - no bear riveting force.
- Unilateral installation.
- The sheet surface coating is not damaged.
- The reworking and consumption are reduced.
- Compared with welding, rigid rod and tapping, the cost is low.
- Strong production flexibility.
Rivmate —— Your Professional Customized closed end rivet nuts Manufacturer
Rivmate specializes in the production and supply of closed-end rivet nuts, offering both standard products and customized fastening solutions. Its core value lies in the closed-end design, which reduces the risk of contaminants entering the bottom of the thread. It is particularly suitable for demanding industrial projects.
Rivmate offers flexible custom manufacturing. Head styles, body structures, materials, dimensions, and surface finishes can all be tailored to your specific assembly requirements. If you have drawings or samples, please send them directly to us for evaluation.
Choose closed end rivet nuts by Material
Closed-end rivet nuts made from different materials vary in terms of corrosion resistance, mechanical properties, and application environments. Please select the appropriate material for your closed-end rivet nuts based on your project’s requirements.
Steel Closed End Rivet Nuts
Carbon steel offers higher mechanical strength and is more cost-effective to procure than stainless steel. ICarbon steel is particularly well-suited for industrial assembly applications that require high-strength connections and cost control.
Stainless Steel Closed End Rivet Nuts
Stainless steel offers superior corrosion resistance and helps reduce oxidation in humid environments. Suitable for industrial applications with high requirements for corrosion resistance and reliability.
Choose closed end rivet nuts By Thread Size
As a supplier to dozens of countries, Rivmate offers closed-end rivet nuts in a variety of metric thread sizes. These products are suitable for a wide range of fastening applications, from lightweight components to heavy-duty industrial applications.
M3 Closed End Rivet Nuts
M3 Rivet Nuts have a riveting range of 0.5–4 mm. They are suitable for assembly applications with limited space and smaller thread sizes.
M8 Closed End Rivet Nuts
M8 Rivet Nuts have a riveting range of 0.5–6.5 mm. They are suitable for larger bolted connections and medium- to heavy-duty sheet metal structures.
M4 Closed End Rivet Nuts
M4 Rivet Nuts have a riveting range of 0.5–5.0 mm. They are particularly suitable for industrial assembly scenarios with greater variations in sheet thickness.
M10 Closed End Rivet Nuts
M10 Rivet Nuts have a riveting range of 0.5–7.5 mm. They are suitable for heavy-duty equipment, large brackets, and industrial structural components.
M5 Closed End Rivet Nuts
M5 Rivet Nuts have a riveting range of 0.5–5.0 mm. They are suitable for connecting machine enclosures, equipment panels, and industrial brackets.
M12 Closed End Rivet Nuts
M12 Rivet Nuts have a riveting range of 0.5–8.0 mm. They are suitable for applications requiring high anti-rotation performance and connection stability.
M6 Closed End Rivet Nuts
M6 Rivet Nuts have a riveting range of 0.5–6.0 mm. They are suitable for applications with a wide range of sheet thicknesses or complex assembly structures.
M16 Closed End Rivet Nuts
M16 Rivet Nuts have a riveting range of 2.5–5 mm. Suitable for large mechanical structures, heavy-duty mounting points, and specialized industrial connections.
Choose closed end rivet nuts By Head Type
Rivmate manufactures closed-end rivet nuts with different head shapes, allowing customers to select the option that best suits their products in terms of contact area, surface height, appearance, and load-bearing stability.
Flat Head Closed End Rivet Nuts
The flat head is a highly versatile head type. With its large contact area, the flat head helps distribute stress across the sheet metal, reducing localized stress. The flat headis suitable for installation in standard sheet metal hole patterns.
Reduced Head Closed End Rivet Nuts
Reduced HeadThe reduced head is smaller than the flat head but protrudes less from the workpiece surface after installation. It is used in applications with specific requirements for installation space, surface height, or appearance.
Countersunk Head Closed End Rivet Nuts
Countersunk heads require a countersink to be machined in advance, allowing them to lie flush with the sheet metal surface. This improves the product’s appearance. Suitable for product designs that require a flat surface or minimal head protrusion.
Choose closed end rivet nuts By Body Type
Rivmate offers closed-end rivet nuts with round, knurled, half-hex, and full-hex bodies. Different body designs affect post-installation anti-rotation performance, riveting stability, suitable hole types, and assembly reliability.
Round Body Closed End Rivet Nuts
Knurled Body Closed End Rivet Nuts
Knurled Body features vertical grooves or knurling on the shaft surface, which helps enhance grip and friction against the walls of sheet metal holes, reducing the risk of the rivet nut rotating when the screw is tightened.
Half Hex Body Closed End Rivet Nuts
Half Hex Body features a hexagonal structure near the head, while the remaining portion retains a circular or deformable structure. Suitable for assembly applications with medium to high torque requirements.
Full Hex Body Closed End Rivet Nuts
The Full Hex Body has an exterior that consists of a complete hexagonal cylindrical structure. It is suitable for high-torque assembly, large-diameter bolt connections, and heavy-duty industrial structures.
| Product Type | Material | Head Type | Body Type | Thread | Grip Range Min-Max |
Hole Size (0 ~ +0.1) |
A (Ref.) |
D (-0.1 ~ +0.07) |
DK | K | L | Part No. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M3 | 0.50-1.50 | 5.00 | 10.00 | 4.90 | 7.20 | 0.80 | 13.30 | SFRFM3-15 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M4 | 0.50-2.00 | 6.00 | 11.30 | 5.90 | 9.00 | 0.80 | 16.00 | SFRFM4-20 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M4 | 2.00-4.00 | 6.00 | 11.30 | 5.90 | 9.00 | 0.80 | 18.00 | SFRFM4-40 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M5 | 0.50-2.50 | 7.00 | 11.50 | 6.90 | 10.00 | 1.00 | 17.00 | SFRFM5-25 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M5 | 2.50-5.00 | 7.00 | 11.50 | 6.90 | 10.00 | 1.00 | 19.00 | SFRFM5-50 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M6 | 0.50-3.00 | 9.00 | 12.70 | 8.90 | 12.30 | 1.30 | 19.20 | SFRFM6-30 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M6 | 3.00-5.50 | 9.00 | 12.70 | 8.90 | 12.30 | 1.30 | 21.00 | SFRFM6-55 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M8 | 0.50-3.00 | 11.00 | 14.80 | 10.90 | 15.00 | 1.50 | 21.50 | SFRFM8-30 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M8 | 3.50-5.50 | 11.00 | 14.80 | 10.90 | 15.00 | 1.50 | 24.00 | SFRFM8-55 |
| Closed-End Rivet Nut | Carbon Steel | Flat Head | Round Body | M10 | 1.00-4.00 | 13.00 | 19.20 | 12.90 | 17.00 | 1.60 | 27.00 | SFRFM10-40 |
| Closed-End Rivet Nut | Stainless Steel 304/316 | Flat Head | Round Body | M4 | 0.50-2.00 | 6.00 | 11.30 | 5.90 | 9.00 | 0.80 | 16.00 | BFRFM4-20 |
| Closed-End Rivet Nut | Stainless Steel 304/316 | Flat Head | Round Body | M5 | 0.50-2.50 | 7.00 | 13.80 | 6.90 | 10.00 | 1.00 | 19.00 | BFRFM5-25 |
| Closed-End Rivet Nut | Stainless Steel 304/316 | Flat Head | Round Body | M6 | 0.50-3.00 | 9.00 | 15.00 | 8.90 | 12.30 | 1.30 | 21.00 | BFRFM6-30 |
| Closed-End Rivet Nut | Stainless Steel 304/316 | Flat Head | Round Body | M8 | 1.00-3.50 | 11.00 | 18.20 | 10.90 | 15.50 | 1.50 | 25.00 | BFRFM8-35 |
| Closed-End Rivet Nut | Stainless Steel 304/316 | Flat Head | Round Body | M10 | 1.00-4.00 | 13.00 | 19.40 | 12.90 | 17.00 | 1.60 | 27.00 | BFRFM10-40 |
Steps of Rivet Nuts Installation
- Insert the rivet nut into the pre-drilled hole, ensuring that the head of the rivet nut is flush with the surface of the workpiece.
- Screw the pull rod of the rivet nut gun into the internal threads of the rivet nut, and hold the tool vertically.
- Activate the rivet nut gun and pull the rod to expand and deform the tail end of the rivet nut, clamping it securely to the workpiece.
- Once riveting is complete, retract the rod in the opposite direction. Check that the rivet nut is secure and confirm that the head is flush with the surface.
Customized closed end rivet nuts for Industrial Assembly
As a supplier serving more than 50 countries worldwide, Rivmate possesses extensive experience and advanced technical expertise. We offer highly flexible customization options for product finishes. We apply color treatments to ensure consistent product appearance, facilitate assembly differentiation, and meet end-customer visual requirements.
- Enhanced corrosion resistance
- Custom Surface Color Coatings
- Improved Color Consistency Across Batches
Closed-End Rivet Nuts support custom spray painting based on RAL color charts, Pantone color codes, or physical color samples. We precisely meet customer requirements for equipment compatibility and overall system color coordination. We offer custom color coatings in gray, blue, red, yellow, green, and other shades. All custom coatings pass professional salt spray, aging, and fade resistance tests, enhancing both industrial functionality and the aesthetic appeal of the entire system.
closed end rivet nuts with certified material traceability
Rivmate operates its own rivet nut factory in China, providing distributors, OEM manufacturers, and industrial sectors with a consistent supply of high-quality standard and custom closed-end rivet nuts. All closed-end rivet nuts produced have passed international authoritative testing and certification systems.
- ISO and IATF Quality System Certifications
- Provides Level 3 PPAP Reports
- Has established a batch-traceable management system
Rivmate has established a testing laboratory that complies with national standards. The laboratory tests Closed-End Rivet Nuts for dimensions, threads, surface treatment, riveting performance, and corrosion resistance requirements. This fundamentally reduces the risk of assembly failures, thread irregularities, unstable riveting, and long-term usage issues.
Applications of closed end rivet nuts
Closed-End Rivet Nuts are suitable for industrial assembly applications requiring dust and moisture protection, internal protection, single-sided installation, and stable threaded connections. Compared to open-end rivet nuts, they are more effective at preventing liquids and dust from entering the assembly area through the bottom of the thread.
Electrical Enclosures
The internal components of electrical enclosures are sensitive to water and dust. The closed-bottom design of Closed End Rivet Nuts helps prevent external contaminants from entering the enclosure. They are particularly suitable for protected threaded connections in electrical enclosures, control cabinets, distribution panels, and metal housings.
Automotive Components
Automotive components are constantly exposed to vibration, moisture, and dust, requiring Closed-End Rivet Nuts to enhance protection and ensure stable connections. They are used in automotive sheet metal parts, body components, battery enclosures, brackets, and interior structures.
Outdoor Equipment
When exposed to the outdoors for extended periods, open-end rivet nuts increase the risk of external liquids and dust entering the enclosure. Closed-end rivet nuts are better suited for providing more protective threaded connection points for metal enclosures and sealed structures.
Machinery Covers and Industrial Equipment
Enclosed structures help protect internal equipment areas from damage. Closed-end rivet nuts provide removable, serviceable threaded connections. They are widely used in machinery enclosures, access panels, protective covers, and mounting brackets.
HVAC Equipment
HVAC equipment is exposed to condensation, dust, and vibration. The sealed design of Closed-End Rivet Nuts prevents the ingress of liquids and dust. They are suitable for air conditioning equipment, ventilation systems, unit enclosures, and metal panel assemblies.
Marine and Corrosion-Prone Environments
Connections in these environments require high levels of moisture resistance, corrosion resistance, and long-term stability. Stainless steel Closed-End Rivet Nuts are particularly suitable for these applications, as they enhance corrosion resistance and service life.
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1.How to choose the right closed end rivet nuts for automotive use
When selecting the appropriate closed-end rivet nuts for automotive applications, consider the installation location, sheet metal thickness, thread specifications, material, corrosion protection requirements, anti-rotation capability, and vibration environment. We recommend prioritizing the use of half-hex and full-hex body rivet nuts, as they provide stronger torque resistance.
2.How to identify quality closed end rivet nuts from different manufacturers？
To assess the quality of closed-end rivet nuts produced by different manufacturers, inspect the structural integrity of the closed end, thread precision, dimensional consistency, surface finish, riveting performance, and batch consistency.
3.How to request quotes for closed end rivet nuts from suppliers？
To obtain an accurate quote for Closed-End Rivet Nuts from suppliers, you need to provide complete information. Provide the supplier with the thread specifications, material, head type, body structure, sheet thickness, surface treatment, purchase quantity, and application scenario for your product. If you have drawings or samples, we recommend sending them along as well. This will ensure you receive a more accurate quote and solution.
4.How to properly install closed end rivet nuts?
To install Closed-End Rivet Nuts correctly, first confirm the sheet metal thickness and the riveting area, then drill holes according to the recommended hole diameter. Next, select the appropriate installation tool and adjust the riveting stroke or installation force appropriately based on the rivet nut specifications, material, and sheet metal thickness. Avoid damaging the sheet metal. It is best to conduct a sample installation test in advance before proceeding with mass assembly.
5.How can galvanic corrosion be prevented when using closed end rivet nuts?
When using closed-end rivet nuts, galvanic corrosion can be prevented by using electrically compatible materials, applying appropriate surface treatments, isolating dissimilar metals, minimizing moisture exposure, and employing suitable sealing or coating methods.
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Rivet Nut Catalog
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Closed End Rivet Nuts Drawing
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Closed end rivet nuts vs.threaded inserts for heavy-duty fastening
Closed-end rivet nuts and threaded inserts both provide internal threaded connections, but they differ in terms of suitable materials, installation methods, protection capabilities, and application scenarios.
| Comparison Item | Closed-End Rivet Nuts | Threaded Inserts |
|---|---|---|
| Main Purpose | Form reliable internal threads in thin plates or sheet metal. | Form or reinforce internal threads in plastic, wood, castings, or solid materials. |
| Suitable Materials | Thin steel sheets, aluminum plates, stainless steel sheets, and sheet metal structures. | Plastic, wood, composite materials, cast aluminum, cast iron, and machined metal parts. |
| Installation Method | Single-side installation using a rivet nut tool for pull-riveting deformation. | Press-in, heat-set, screw-in, molded-in, or threaded installation, depending on the insert type. |
| Suitable for Blind-Side Access | Highly suitable; designed for blind installation where the backside cannot be accessed. | Depends on the structure and insert type; not all threaded inserts support single-side installation. |
| Suitable for Thin Sheets | Very suitable for thin sheet metal fastening. | Usually not suitable for very thin sheet metal unless specially designed. |
| Dust and Moisture Protection | The closed-end bottom helps reduce moisture and dust entry through the threaded end. | Most threaded inserts do not have a sealed-bottom protective structure. |
| Load-Bearing Capability | Suitable for medium- to high-strength connections in thin sheets. Knurled, half-hex, or full-hex bodies can improve anti-rotation performance. | Suitable for high-strength thread reinforcement in solid materials. Load capacity depends on the base material and insert structure. |
| Anti-Rotation Performance | Knurled, half-hex, and full-hex structures can improve resistance to rotation. | Depends on external threads, barbs, knurling, or locking features. |
| Corrosion Resistance | Can be improved through stainless steel, zinc plating, zinc-nickel alloy coating, passivation, and other surface treatments. | Depends on material selection and surface treatment. |
| Typical Applications | Electrical enclosures, automotive sheet metal, outdoor equipment, machinery housings, and sealed metal boxes. | Plastic parts, wooden components, castings, thread repair, and machined components. |
| Heavy-Duty Application Suitability | Suitable for heavy-duty connections in thin sheet metal and sealed structural assemblies. | Suitable for heavy-duty thread reinforcement in solid materials. |
| Main Advantages | Single-side installation, sealed-end protection, thin-sheet compatibility, and removable bolted connections. | Improves thread strength in solid materials and is suitable for repeated assembly and thread repair. |
| Main Limitations | Requires correct matching of sheet thickness, hole size, and installation tool. | Has higher requirements for base material thickness, installation method, and hole preparation. |
Industrial suppliers for closed end rivet nuts
Rivmate is a professional supplier of closed-end rivet nuts. Its customer base spans industries such as sheet metal fabrication, electrical enclosures, automotive parts, outdoor equipment, machinery housings, and industrial assembly.
Rivmate offers both standard and custom closed-end rivet nut products. The company manufactures closed-end rivet nuts in a wide range of specifications, materials, head types, and body configurations, designed to help customers quickly select the right product for their specific projects.
If you are looking for a reliable, high-quality supplier of closed-end rivet nuts, please provide Rivmate with the following information to receive a quote and solution proposal:
- Thread specifications
- Material requirements
- Head type requirements
- Body structure
- Sheet metal thickness or riveting range
- Surface treatment requirements
- Purchase quantity
- Application environment
- Drawings or samples