open end rivet nuts Manufacturer
As a Chinese supplier of open-end rivet nuts, Rivmate offers a wide range of standard and custom open-end rivet nuts. Their open design accommodates bolts of various lengths, providing greater flexibility in assembly space. They are widely used in sheet metal enclosures, electrical cabinets, mechanical equipment, mounting brackets, and industrial assembly applications.
- Easy to install and suitable for high-volume use
- Flexible selection of compatible specifications and designs
- Supports both standard specifications and custom designs
Why Choose Our open end rivet nuts
- The opening at the bottom is designed to accommodate longer bolts.
- 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 open end rivet nuts Manufacturer
Rivmate specializes in the custom manufacturing and bulk supply of open-end rivet nuts. We offer one-stop services ranging from specification confirmation and sample development to surface treatment and export packaging.
Rivmate’s team of experts will customize thread specifications, clamping range, head type, body structure, material, and surface treatment based on your drawings or application requirements. Our goal is to meet your industrial assembly needs.
Choose open end rivet nuts by Material
Rivmate offers open-end rivet nuts made of carbon steel, stainless steel, and aluminum to meet various assembly needs. If you’re unsure which material to choose, Rivmate can also help you select the appropriate material, design, and specifications.
Steel Open End Rivet Nuts
Carbon steel Open End Rivet Nuts offer consistent fastening strength at a lower cost, making them an ideal choice for large-scale industrial bulk purchases. Steel Open End Rivet Nuts represent the optimal balance between strength and cost.
Stainless Steel Open End Rivet Nuts
Stainless steel Open End Rivet Nuts are more expensive than carbon steel but offer superior corrosion resistance, making them suitable for long-term use. Suitable for assembly projects requiring rust protection and a long service life.
Aluminum Open End Rivet Nuts
Aluminum Open End Rivet Nuts are less strong than steel but are lightweight and require less installation force. They are the ideal choice for connecting aluminum sheets, lightweight panels, or lightweight structures.
Choose open end rivet nuts By Thread Size
Rivmate maintains a stock of Open End Rivet Nuts in a variety of standard sizes for customers across different industries. Different sizes are designed for different assembly strengths and sheet thickness ranges. Please verify the actual specifications of your product before purchasing.
M3 Open 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 Open End Rivet Nuts
M8 Rivet Nuts have a riveting range of 0.5–6.5 mm. Suitable for larger bolted connections and medium- to heavy-duty sheet metal structures.
M4 Open End Rivet Nuts
M4 Rivet Nuts have a riveting range of 0.5–5.0 mm. They are suitable for assembly scenarios with greater variations in sheet thickness.
M10 Open 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 Open 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 Open 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 Open 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 Open 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 open end rivet nuts By Head Type
Rivmate manufactures various head types to meet the requirements of different projects. These include countersunk head , reduced head , and flat head rivets. Different head types affect the appearance of the workpiece surface and the contact area; please select the appropriate type based on your needs.
Flat Head Open End Rivet Nuts
The flat-head design is the most common head type for rivet nuts. The flat-head design increases the contact area between the head and the workpiece surface, thereby improving installation stability, making it suitable for general sheet metal assembly.
Reduced Head Open End Rivet Nuts
Reduced head have a smaller contact area than flat-head rivet nuts. They protrude less after installation. Suitable for panels with limited installation space and where appearance and minimal protrusion are required.
Countersunk Head Open End Rivet Nuts
Countersunk head require a countersunk hole to be pre-drilled in the workpiece. They are particularly suitable for assembly locations where a flatter surface or a head recessed into the workpiece surface is required.
Choose open end rivet nuts By Body Type
As a supplier, Rivmate offers a variety of carbon steel rivet nut designs—including Round Body, Knurled Body , Half Hex Body and Hex Body —based on the shape of the mounting hole in your product, anti-rotation requirements, sheet metal thickness, and assembly environment.
Round Body Open End Rivet Nuts
Knurled Body Open 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 Open 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 Open 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.
Open-End Rivet Nuts Product Range
Open-end rivet nuts are through-hole threaded inserts designed for one-sided installation in sheet metal, tubes, enclosures and structural panels. According to the Rivmate rivet nut catalogue, open-end rivet nuts are available in carbon steel, stainless steel and aluminum, with multiple head types and body structures.
| Material | Head Type | Body Type | Available Thread Range | Hole Form | Application Advantage |
|---|---|---|---|---|---|
| Carbon Steel | Flat Head | Round Body | M3 - M16 | Round Hole | Standard and cost-effective option for general sheet metal fastening. |
| Carbon Steel | Flat Head | Knurled Body | M3 - M12; inch sizes available | Round Hole | Knurled outer body improves anti-rotation performance after installation. |
| Carbon Steel | Reduced Head | Round / Knurled Body | M3 - M10 | Round Hole | Smaller head profile for applications requiring a cleaner surface appearance. |
| Carbon Steel | Countersunk Head | Round / Knurled Body | M3 - M12 | Round Hole | Suitable for flush or near-flush sheet metal assembly. |
| Carbon Steel | Flat / Reduced Head | Full Hex Body | M3 - M12 | Hex Hole | Provides strong mechanical locking and higher resistance to spinning. |
| Carbon Steel | Flat / Reduced Head | Half Hex Body | M3 - M12 | Hex / Half Hex Hole | Balances anti-rotation performance and installation flexibility. |
| Stainless Steel | Flat / Reduced / Countersunk Head | Round / Knurled / Full Hex / Half Hex Body | M3 - M12 | Round / Hex Hole | Recommended for corrosion-resistant fastening in outdoor, humid or stainless assemblies. |
| Aluminum | Flat / Reduced Head | Round / Knurled Body | M4 - M10 | Round Hole | Lightweight option for aluminum panels, light-duty assemblies and weight-sensitive structures. |
| Carbon Steel / Stainless Steel | US Type | Knurled / Half Hex Body | Metric and UNC inch sizes | Round / Hex Hole | Suitable for projects using North American thread standards and inch-dimension designs. |
| Carbon Steel | UK Type | Round / Knurled / Half Hex Body | Metric sizes | Round / Hex Hole | Designed for specific market installation habits and corresponding hole requirements. |
Open-End Rivet Nuts Specification Table
The following specification table is based on the standard metric open-end flat head round body rivet nuts in the catalogue. Dimensions are in millimeters.
| Thread | Grip Range Min | Grip Range Max | Hole Size (0 ~ +0.1) | A (Ref.) | D (-0.1 ~ +0.07) | DK | K | L | Part No. |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.50 | 1.50 | 5.00 | 4.70 | 4.90 | 7.20 | 0.80 | 8.70 | SFRM3-15 |
| 1.50 | 2.50 | 9.50 | SFRM3-25 | ||||||
| M4 | 0.50 | 2.00 | 6.00 | 6.00 | 5.90 | 8.50 | 0.80 | 10.50 | SFRM4-20 |
| 2.00 | 3.50 | 12.00 | SFRM4-35 | ||||||
| M5 | 0.50 | 2.50 | 7.00 | 7.50 | 6.90 | 10.00 | 1.00 | 13.00 | SFRM5-25 |
| 2.50 | 5.00 | 8.50 | 17.00 | SFRM5-50 | |||||
| M6 | 0.50 | 3.00 | 9.00 | 9.20 | 8.90 | 12.30 | 1.30 | 15.50 | SFRM6-30 |
| 3.00 | 5.50 | 18.00 | SFRM6-55 | ||||||
| M8 | 0.50 | 3.50 | 11.00 | 11.50 | 10.90 | 15.00 | 1.50 | 18.50 | SFRM8-35 |
| 3.50 | 6.00 | 21.00 | SFRM8-60 | ||||||
| M10 | 0.50 | 2.50 | 13.00 | 11.50 | 12.90 | 16.30 | 1.50 | 17.00 | SFRM10-25 |
| 2.50 | 4.00 | 13.00 | 12.00 | 12.90 | 17.00 | 1.60 | 21.00 | SFRM10-40 | |
| 4.00 | 6.00 | 13.00 | 12.50 | 12.90 | 17.00 | 1.60 | 24.00 | SFRM10-60 | |
| 1.00 | 3.50 | 12.00 | 11.00 | 11.90 | 16.00 | 1.60 | 19.00 | SFRM10-35(12H) | |
| M12 | 1.00 | 4.00 | 15.00 | 13.50 | 14.90 | 18.00 | 1.70 | 22.00 | SFRM12-40(15H) |
| 4.00 | 6.50 | 15.00 | 14.00 | 14.90 | 18.00 | 1.70 | 25.00 | SFRM12-65(15H) | |
| 1.00 | 4.00 | 16.00 | 16.00 | 15.90 | 22.00 | 2.00 | 25.00 | SFRM12-40 | |
| M16 | 2.50 | 5.00 | 21.00 | 20.00 | 20.90 | 26.00 | 2.50 | 33.00 | SFRM16-50 |
Note: This table is for standard metric open-end flat head round body rivet nuts. Other structures such as knurled body, reduced head, countersunk head, full hex body and half hex body have different DK, K, L and hole-size requirements. Final selection should be confirmed according to material, head type, body structure, grip range and installation hole design.
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.
Open End Rivet Nuts Manufacturing You Can Trust
Rivmate has established a 40,000-square-meter factory equipped with 64 multi-station production machines and 6 laser sorting machines. Its annual production capacity exceeds 100 million open-end rivet nuts. Leveraging its large-scale automated production capabilities, Rivmate can provide a stable supply of open-end rivet nuts to distributors, OEM customers, and industrial assembly clients.
- Supports traceable production control
- Ample inventory of standard sizes for fast delivery
- Offers customized products and packaging
Rivmate not only offers standard specifications but also provides customization services. These include thread sizes, riveting ranges, head types, shank structures, base designs, and surface treatments. We tailor solutions to match your product applications, taking into account different sheet thicknesses, hole diameters, locking torques, and operating environments. We help customers seeking Open End Rivet Nuts secure a more reliable product supply.
Open End Rivet Nuts Testing for Stable Assembly
As a manufacturer and supplier of open-end rivet nuts for the global market, Rivmate has established a testing laboratory that meets national standards to provide accurate and reliable data on its open-end rivet nuts. This helps reduce the risk of thread defects and installation slippage.
- Manufactured in compliance with ISO and IATF quality management system standards
- Visual inspection pass rate as high as 99%
- 13 rigorous inspection processes
- Level 3 PPAP reports provided
Every batch of rivet nuts produced by Rivmate undergoes mandatory testing for tensile strength, shear strength, hardness, salt spray resistance, and appearance and dimensional compliance.Precision tolerances are strictly controlled within ±0.02 mm. Our open-end rivet nuts have demonstrated salt spray corrosion resistance of 72 to 200 hours or more. 100% of products pass thread go/no-go gauge inspections. All inspection reports are provided with each batch and are fully traceable, strictly adhering to multiple national standards for industrial quality control.
Applications of Open End Rivet Nuts
The advantage of open-end rivet nuts is that they are suitable for assembly locations where it is not possible to install a standard nut from the back, where direct tapping is not feasible, or where welding a nut is not practical. The open design allows bolts to pass through, offering greater flexibility. They are particularly well-suited for high-volume industrial assembly.
Electrical Cabinets
Components such as electrical cabinet doors, control panel doors, internal rails, and terminal block brackets require repeated assembly and adjustment; Open End Rivet Nuts are therefore better suited for these applications to facilitate long-term maintenance.
Machinery Enclosures
Open End Rivet Nuts are suitable for connecting most removable panels, access covers, and equipment brackets on machinery. They can replace some welded connections and rivet nuts installed from the back, thereby improving assembly flexibility.
Tubes & Profiles
Since standard nuts cannot be placed on the back side of tubes or profiles, Open End Rivet Nuts offer a highly efficient assembly process that is completed from one side. They are particularly suitable for metal frames, aluminum profiles, and equipment support structures.
HVAC Equipment
HVAC panels, access doors, brackets, and equipment enclosures all require disassembly for maintenance. Compared to standard rivet nuts, Open End Rivet Nuts provide a more stable internal threaded connection.
Automotive Interiors and Bracket Components
Open End Rivet Nuts reduce the assembly constraints associated with back-mounted nuts and improve product aesthetics. They are suitable for interior panels, lightweight brackets, protective covers, mounting plates, and auxiliary fastening structures.
Metal Furniture and Display Rack Structures
It is not possible to install nuts from the back side of metal tubing, frames, and profiles. However, Open End Rivet Nuts offer the advantage of single-sided installation, facilitating subsequent assembly and disassembly.
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1.How to choose the right open end rivet nut for aluminum panels？
When selecting an open-end rivet nut for aluminum sheets, consider the sheet thickness, mounting hole diameter, clamping range, head type, body design, material, and tightening torque.
In terms of material, aluminum open-end rivet nuts are the preferred choice. If higher strength is required, carbon steel or stainless steel rivet nuts are recommended, with particular attention to the installation force. Regarding head types, if the aluminum sheet being assembled is very thin or has a low load-bearing capacity, flat heads with a larger contact surface are recommended. If there are high aesthetic requirements for the workpiece surface, reduced-head or countersunk heads are recommended. Regarding body structure, knurled, half-hex, or full-hex bodies should be used when high torque resistance is required.
2.Which open end rivet nuts are recommended for marine environments?
In marine environments, stainless steel open-end rivet nuts are the top choice. If the application will be in prolonged proximity to seawater, docks, or ships, we recommend using 316 stainless steel open-end rivet nuts or selecting a surface treatment with a higher corrosion resistance rating. Conduct a salt spray test to evaluate performance based on specific requirements.
3.Open end rivet nuts with high tensile strength suitable for industrial machinery?
High-tensile open-end rivet nuts can be used in industrial machinery assembly applications. It is important to select the correct material, design, and size. For material, carbon steel open-end rivet nuts or stainless steel open-end rivet nuts are the preferred choices. Carbon steel offers good strength, while stainless steel provides high corrosion resistance. In terms of design, choosing Knurled Body , Half Hex Body, or Full Hex Body configurations can improve pull-out strength and resistance to rotation.
4.How to prevent spinning when installing open end rivet nuts?
When installing Open End Rivet Nuts, take care to prevent slippage by carefully controlling the hole diameter, sheet thickness, clamping range, body structure, and tightening torque. If the hole diameter is too large, the rivet nut will not be secured properly. If the hole diameter is too small, the rivet joint may deform. Mismatched sheet thickness, insufficient anti-rotation capability, or inadequate riveting force can all cause the Open End Rivet Nuts to rotate.
5.What is the lifespan of open end rivet nuts when exposed to corrosive environments?
The service life of open-end rivet nuts in corrosive environments depends on factors such as material, surface treatment, installation location, corrosive media, humidity, temperature, salt spray concentration, and maintenance conditions.
Resource Center
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Rivet Nuts Catalog
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Open End Blind Rivet Drawing
Download the technical drawings for the rivets, which include dimensions, internal structure, and basic product information
Open end rivet nuts vs closed end: which is better for steel fabrication?
In steel fabrication, both open-end rivet nuts and closed-end rivet nuts can be used to create internal threaded connections in thin steel plates, steel structural components, equipment housings, brackets, and sheet metal assemblies. Which one is more suitable depends on the specific requirements of your product.
| Comparison Item | Open End Rivet Nuts | Closed End Rivet Nuts |
|---|---|---|
| Bottom Structure | Open bottom | Closed bottom |
| Suitability for Steel Fabrication | Suitable for most general steel fabrication applications | Suitable for steel applications requiring sealing, dust protection or water resistance |
| Bolt Insertion Space | The bolt can pass through the open bottom, offering more flexible length matching | Bolt length is limited by the closed end depth |
| Sealing Performance | No sealed structure | Helps reduce dust, moisture or liquid ingress from the bottom |
| Cost Advantage | More universal structure, usually more suitable for bulk purchasing | Usually costs more than open end types |
| Common Application Positions | Steel enclosures, machinery brackets, mounting plates, equipment panels and profile connections | Outdoor steel cabinets, sealed panels, electrical enclosures and components used in humid environments |
| Suitability for Longer Bolts | More suitable | Closed end depth must be confirmed |
| Maintenance and Disassembly | Suitable for standard connection points that require repeated assembly and disassembly | Suitable for connection points where internal threads need protection |
| Corrosion Resistance Requirements | Carbon steel plating, stainless steel or high-corrosion-resistant treatment should be selected according to the environment | Material and surface treatment should also be selected according to the application environment |
| Recommended Use Scenarios | General industrial steel structure assembly with no sealing requirement and cost-sensitive purchasing needs | Steel structure assembly requiring water resistance, dust protection or prevention of liquid ingress |
What are the main advantages of using open end rivet nuts?
The advantage of open-end rivet nuts is that they support single-sided installation, which improves assembly efficiency. Their open-bottom design allows bolts to be inserted easily and without restriction. They provide a stable internal threaded connection point in thin sheets. They are suitable for general industrial batch assembly. Compared to welded and standard rivet nuts, open-end rivet nuts offer greater installation flexibility and more consistent appearance.
Suppliers of open end rivet nuts
Rivmate is a professional manufacturer and supplier of open-end rivet nuts. We support both bulk supply and custom production of open-end rivet nuts. We offer open-end rivet nuts in various specifications—including thread sizes, materials, head types, body structures, and surface treatments—to suit different assembly locations.
If you are looking for reliable suppliers of open-end rivet nuts, please provide the following information to request a quote:
- Thread specifications
- Sheet thickness
- Hole diameter
- Material
- Surface treatment
- Quantity
- Application
- Drawings
- Packaging