Bulge Rivet Nuts
Bulge Rivet Nuts
RivetFast Bulge Rivet Nuts, also known as expansion-type rivet nuts, are designed to provide superior pull-out strength and secure blind-side internal threads in thin materials.
This product belongs to our Rivet Nuts range.
What Are Bulge Rivet Nuts?
Bulge Rivet Nuts are a specialized type of rivet nut that expand outward on the blind side to create a strong mechanical lock.
During installation, the rivet nut body deforms into a bulge shape behind the base material, providing higher resistance to pull-out and torque compared to conventional rivet nuts. This design is especially effective in thin sheet metal and applications where access is limited to one side.
Key Advantages of Bulge Rivet Nuts
High pull-out and torque resistance
Expansion (bulge) body design for improved grip
Reliable blind-side installation
Suitable for thin or soft materials
Stable performance under vibration
Available Materials, Head Types & Surface Finishes
Bulge Rivet Nuts are available in a wide range of head styles, end types, materials, and surface finishes to meet different installation, strength, and environmental requirements.
Materials & Surface Finishes
Steel (Zinc Plated)、Stainless Steel、Aluminum
End Type
Open End、Closed End
Head Type
Flat Head、Reduced Head
Customized sizes and colors are available according to customer drawings.
Specifications & Size Options for Bulge Rivet Nuts
Thread sizes: M3 – M12 (or equivalent imperial sizes)
Grip ranges for different material thicknesses
Multiple head diameters and body lengths
Detailed dimensional drawings and technical data are available upon request.
Installation Method for Bulge Rivet Nuts
Bulge Rivet Nuts are installed using a rivet nut installation tool.
During installation, the tool pulls the threaded mandrel, causing the body to expand and form a bulge behind the base material, securely locking the rivet nut in place.
Open-End vs Closed-End Blind Rivets
While Open-End Blind Rivets are suitable for general fastening, Closed-End Blind Rivets are designed for applications requiring sealing or improved corrosion resistance.
| Feature | Open-End Blind Rivets | Closed-End Blind Rivets |
|---|---|---|
| End structure | Open | Sealed |
| Waterproof performance | No | Yes |
| Cost | Lower | Higher |
| Typical use | General fastening | Sealed applications |
Typical Applications for Bulge Rivet Nuts
Bulge Rivet Nuts are widely used across multiple industries and applications, including:
- Sheet metal assemblies
- Electrical and industrial enclosures
- Panels and housings
- Automotive components
- Machinery and equipment structures
- Semi-structural and load-bearing assemblies
Customization, Quality Control & Supply Capability
We offer flexible customization options to meet specific project requirements, including non-standard sizes, materials, and surface finishes.
Custom thread sizes and grip ranges
Material and coating selection based on application needs
Consistent quality control throughout production
Stable supply capacity for small batches and large-volume orders
Why Choose RivetFast for Your Rivet Nuts?
ISO 9001 Certified Manufacturing
All RivetFast rivet nuts are manufactured under an ISO 9001 certified quality management system, ensuring consistent quality and process control.
Engineered for Reliable Installation
Designed for strong thread engagement and secure installation, our rivet nuts deliver stable performance in thin sheets and blind applications.
Complete Rivet Nut Range
Covering standard, sealed, stainless steel, and structural rivet nuts to meet diverse material and application requirements.
Own Factory, Direct Control
With in-house manufacturing, RivetFast maintains full control over production, quality, and lead times—supporting stable supply and flexible specifications.
Request a Quote for Bulge Rivet Nuts
Contact us with your required size, material, and order quantity—we will reply within 24 hours.
Q1:What makes Bulge Rivet Nuts different from other rivet nuts?
Bulge Rivet Nuts form an expanded bulge on the blind side, providing higher pull-out and torque resistance.
Q2:Are Bulge Rivet Nuts suitable for thin materials?
Yes, they are specifically designed to perform well in thin sheet metal and soft materials.
Q3:Can Bulge Rivet Nuts be installed from one side only?
Yes, like all rivet nuts, they allow blind-side installation.
Q4:Do you offer stainless steel Bulge Rivet Nuts?
Yes, Bulge Rivet Nuts are available in multiple materials, including stainless steel.
Q5:Are Bulge Rivet Nuts reusable?
Once installed, Bulge Rivet Nuts are generally not reusable.
This product is part of RivetFast’s Rivet Nuts product range and is manufactured to meet industrial fastening requirements.
Internal Links
Flat Head Rivet Nuts
Reduced Head Rivet Nuts
Stainless Steel Rivet Nuts
Bulge Rivet Nuts
