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Flat Head Hexagon Rivet Nuts - Stainless Steel
Key Features
- ✓ Certified Durability
- ✓ 3 Year Extended Warranty
- ✓ 30 Day Free Returns
- ✓ Free Technical Support From Our Engineers
Discover about Flat Head Hexagon Rivet Nuts
Uncover the Stainless Steel Flat Head Hexagon Rivet Nuts by RivetGo, built for maximum torque resistance in demanding applications. With a flat head and hexagonal body, these rivet nuts provide exceptional anti-rotation performance for heavy-duty fastening. Crafted from stainless steel, they offer excellent corrosion resistance for long-lasting performance. Check out a related hexagon rivet nut: Reduced Head Hexagon Rivet Nuts.
Key Features
Unlike knurled rivet nuts, the Flat Head Hexagon Rivet Nuts feature a hexagonal body that fits into a matching hex hole, delivering superior anti-rotation capabilities for high-torque applications. The flat head design ensures a larger contact surface for better load distribution compared to reduced head options, making them ideal for structural assemblies.
Applications
Perfect for industrial rivet nuts applications such as automotive frames, heavy machinery, and structural assemblies where high torque is required, these rivet nuts are available in M3 to M12. Pair with our Rivet Nut Tools for easy installation.
Shipping Information

Understanding the Size Chart:
- Thread Size (d): The metric thread size (e.g., M3, M4) compatible with matching bolts or screws.
- Grip Range (e): The range of material thickness the rivet nut can securely fasten (e.g., 0.5-2 mm).
- Hole Size (H): The recommended diameter of the hole to be drilled in the material for installation.
- Head Height (E): The height of the rivet nut head after installation, affecting the protrusion above the surface.
- Head Diameter (B): The diameter of the rivet nut head, determining the contact area with the material.
- Overall Length (L): The total length of the rivet nut before installation.
- Installed Length (L₂): The length of the rivet nut after installation, indicating the space it occupies.
We offer custom sizes for bulk orders, contact us to discuss your requirements.
d | e | H | E | B | L | L₂ |
---|---|---|---|---|---|---|
Thread Size | Grip Range | Hole Size | Head Height | Head Diameter | Overall Length | Installed Length |
M3 | 0.3 - 2 | 5 | 1 | 7 | 9 | 4.5 |
M4 | 0.5 - 2.5 | 6 | 1 | 9 | 11 | 5.8 |
M5 | 0.5 - 3 | 7 | 1 | 10 | 13 | 7.5 |
M6 | 0.5 - 3 | 9 | 1.5 | 12.5 | 15 | 8 |
M8 | 0.5 - 3.5 | 11 | 1.5 | 15 | 18 | 11 |
M10 | 1 - 4 | 13 | 1.7 | 17 | 21 | 12.5 |
M12 | 1 - 5 | 16 | 2 | 19 | 24 | 14 |
Note: All measurements are in millimeters (mm) unless otherwise specified, with tolerances applicable.
Understanding the Size Chart:
- Thread Size (d): The metric thread size (e.g., M3, M4) compatible with matching bolts or screws.
- Grip Range (e): The range of material thickness the rivet nut can securely fasten (e.g., 0.5-2 mm).
- Hole Size (H): The recommended diameter of the hole to be drilled in the material for installation.
- Head Height (E): The height of the rivet nut head after installation, affecting the protrusion above the surface.
- Head Diameter (B): The diameter of the rivet nut head, determining the contact area with the material.
- Overall Length (L): The total length of the rivet nut before installation.
- Installed Length (L₂): The length of the rivet nut after installation, indicating the space it occupies.
We offer custom sizes for bulk orders, contact us to discuss your requirements.
Detail | Info |
---|---|
Head Shape | Flat Head |
Material | 304(A2) Stainless Steel |
End Type | Open End |
Body Form | Hexagonal |
Finish | Natural |
Metric or Imperial? | Metric |
Head Shape: The design of the rivet nut’s head, affecting its fit and load distribution. Options include Flat Head, Reduced Head, and Countersunk Head.
Material: The composition of the rivet nut, impacting strength and resistance. Options include Stainless Steel, Steel, Aluminum, and Brass. Note: At RivetGo, we only sell Stainless Steel rivet nuts.
End Type: Whether the rivet nut’s bottom is open or closed, affecting sealing and bolt fit. Options are Open End and Closed End.
Body Form: The texture or shape of the rivet nut’s body, influencing grip and anti-rotation. Options include Knurled, Hexagon, and Smooth. Note: At RivetGo, we only sell Knurled and Hexagon body forms.
Finish: The surface treatment of the rivet nut, affecting appearance and durability. Options include Natural, Zinc-Plated, Passivated, and Painted. Note: At RivetGo, we only sell rivet nuts with a Natural finish.
Metric or Imperial?: The thread size measurement standard, determining bolt compatibility. Options are Metric (e.g., M3, M4) and Imperial (e.g., 1/4-20). Note: At RivetGo, we only sell Metric rivet nuts.

Installation Guide
- Drill a hexagonal hole in the material matching the specified Hole Size (H) in the Size Chart.
- Insert the Flat Head Hexagon Rivet Nut into the hexagonal hole, ensuring the hex body aligns with the hole shape.
- Use a compatible rivet nut tool to compress and secure the rivet nut, locking the hex body into the material.
- Thread a matching bolt or screw into the rivet nut to complete the assembly.
Note: Ensure the material thickness falls within the specified Grip Range (e) for a secure fit.
Technical Notes
- Ensure the material thickness is within the Grip Range to avoid installation failure.
- Requires a hexagonal hole for installation to maximize anti-rotation performance; use a hex broach or punch for accurate hole preparation.
- The hex body provides superior torque-out resistance compared to knurled designs, ideal for high-torque applications.
- Open End design allows flexibility for bolts of varying lengths but is not suitable for waterproof applications.
- Recommended for use with stainless steel bolts to prevent galvanic corrosion.