Nut Insert Round Body Large Flange Technical Datasheet
Open and Closed End
Product Overview
The Nut Insert Round Body Large Flange is a blind threaded insert designed to provide strong, reusable internal threads in thin sheet materials where access is available from only one side. The round body provides reliable installation in round holes, while the large flange offers an increased bearing surface that improves load distribution and pull-through resistance compared to standard flange designs.
This datasheet covers both Open End and Closed End variants, manufactured in Steel (Zinc Plated) and Stainless Steel, and provides dimensional data, technical specifications, material options, and application guidance for engineering and manufacturing applications.
Table of Contents
Standards
Manufacturers Standard
Installation
Dimensions
Open End Round Body Large Flange Nut Insert
ITEM CODE: 4051
The Open End Round Body Large Flange Nut Insert is the most commonly used blind threaded insert for general-purpose fastening applications. Its open-ended design allows screws or bolts to pass completely through the insert when required, making it suitable for assemblies where longer fasteners or through-hole engagement is needed. The large flange provides increased bearing area, improving pull-through resistance and load distribution in thin sheet materials.
| Size | Grip Range | A | Hole Size +0.1 | D +0.07, -0.1 | B | K | L |
|---|---|---|---|---|---|---|---|
| M3 – Gr 1 | 0.5-1.5 | 6 | 5 | 4.9 | 8 | 0.8 | 10 |
| M3 – Gr 2 | 2.0-3.5 | 11.5 | |||||
| M4 – Gr 1 | 0.5-2.0 | 7 | 6 | 5.9 | 9 | 0.8 | 10.5 |
| M4 – Gr 2 | 2.0-3.5 | 12 | |||||
| M5 – Gr 1 | 0.5-2.5 | 7.5 | 7 | 6.9 | 10 | 1 | 13 |
| M5 – Gr 2 | 2.5-5.0 | 8.5 | 16.5 | ||||
| M6 – Gr 1 | 0.5-3.0 | 9.2 | 9 | 8.9 | 12.3 | 1.3 | 15 |
| M6 – Gr 2 | 3.0-5.5 | 10.5 | 19.5 | ||||
| M8 – Gr 1 | 1.0-3.5 | 11.5 | 11 | 10.9 | 14.5 | 1.5 | 18.5 |
| M8 – Gr 2 | 3.5-6.0 | 12 | 21 | ||||
| M10 – Gr 1 | 1.0-4.0 | 13.5 | 13 | 12.9 | 17 | 1.7 | 21.5 |
| M10 – Gr 2 | 4.0-6.5 | 14 | 24 | ||||
| M12 – Gr 1 | 1.0-4.0 | 13.5 | 15 | 14.9 | 18 | 1.7 | 22 |
| M12 – Gr 2 | 4.0-6.5 | 14 | 25 |
Closed End Round Body Large Flange Nut Insert
ITEM CODE: 4058
The Closed End Round Body Large Flange Nut Insert features a sealed base that prevents screws from passing through the insert. This design helps protect the internal thread from moisture, dust, oil and other contaminants while providing a clean finished appearance. Closed end inserts are commonly used in applications requiring environmental sealing, corrosion resistance or protection of internal components.
| Size | Grip Range | A | Hole Size +0.1 | D +0.07, -0.1 | B | K | L |
|---|---|---|---|---|---|---|---|
| M4 – Gr 1 | 0.5-2.0 | 11.3 | 6 | 5.9 | 9 | 0.8 | 16 |
| M4 – Gr 2 | 2.0-4.0 | 18 | |||||
| M5 – Gr 1 | 0.5-3.0 | 11.5 | 7 | 6.9 | 10 | 1 | 17 |
| M5 – Gr 2 | 2.5-5.0 | 19 | |||||
| M6 – Gr 1 | 0.5-3.0 | 12.7 | 9 | 8.9 | 12.3 | 1.3 | 19.2 |
| M6 – Gr 2 | 3.0-5.0 | 21 | |||||
| M8 – Gr 1 | 0.5-3.0 | 14.8 | 11 | 10.9 | 15 | 1.5 | 21.5 |
| M8 – Gr 2 | 3.0-5.5 | 24 | |||||
| M10 – Gr 1 | 1.0-4.0 | 19.2 | 13 | 12.9 | 17 | 1.6 | 27 |
| M10 – Gr 2 | 3.5-6.0 | 22 | 32.5 |
all dimensions in mm
Material Characteristics and Recommended Applications
| Material | Characteristics | Typical Applications |
|---|---|---|
| Steel Zinc Plated | High strength, economical, suitable for indoor environments | Industrial equipment, electrical panels, machinery |
| Stainless Steel A2 | Excellent corrosion resistance and strength | Food equipment, marine, outdoor enclosures, pharmaceutical machinery |
Technical Specifications
| Property | Specification |
|---|---|
| Product Type | Blind Rivet Nut |
| Body Style | Round Body |
| Flange Style | Large Flange |
| End Style | Open End / Closed End |
| Thread Type | ISO Metric |
| Installation | Blind Installation |
| Material Options | Steel, Stainless Steel |
| Finish (Steel) | Zinc Plated |
| Finish (SS) | Plain Passivated |
| Installation Tool | Manual, Pneumatic, Hydraulic |
| Recommended Materials | Steel, Stainless Steel, Aluminium, Composite Panels |
Applications
- Sheet Metal Fabrication
- Electrical Control Panels & Enclosures
- Datacentres
- HVAC Equipment
- Telecommunications Cabinets
- Data Centre Infrastructure
- Automotive Components
- Commercial Vehicles
- Furniture Manufacturing
- White Goods & Appliances
- Signage
- Solar Equipment
- General Industrial Fabrication
Advantages
- Large flange provides increased bearing area.
- Improved pull-through resistance compared to standard flange inserts.
- Suitable for thin sheet materials.
- Blind-side installation.
- Creates strong reusable threads.
- Eliminates welding.
- Ideal where access is available from one side only.
- Fast installation.
- Suitable for automated assembly.
- Available in both open and sealed configurations.
Frequently Asked Questions
What is the advantage of a large flange nut insert?
The large flange provides a greater bearing surface, increasing pull-through resistance and improving load distribution on thin or soft materials.
What is the difference between open end and closed end nut inserts?
Open end inserts allow screws to pass completely through the insert, while closed end inserts have a sealed bottom that prevents moisture, dust, and contaminants from entering the assembly.
When should I use a closed end nut insert?
Closed end inserts are recommended when environmental sealing, corrosion protection, or preventing liquid ingress is important.
Can these nut inserts be installed from one side?
Yes. They are blind fasteners and require access from only one side of the workpiece.
What materials can these inserts be installed into?
They are commonly installed into steel, stainless steel, aluminium, and other ductile sheet materials.
Are they reusable?
Yes. The internal thread is designed for repeated assembly and disassembly.
Which installation tools are compatible?
Manual, battery-powered, pneumatic, and hydraulic rivet nut installation tools can all be used depending on production volume.
Need Technical Assistance or a Quote?
Looking for pricing, samples, CAD drawings, or help selecting the right fastener? Our team can help you choose the correct product for your application.
📧 sales@horizonincindia.com | 📞 +91 80 4117 9152 | 💬 +91 99167 77262
Related Products
Technical Disclaimer
The technical information, specifications, dimensions, mechanical properties, drawings, and performance data provided on this website are intended for general reference and engineering guidance only. Values shown are representative of products manufactured under normal production conditions and may vary depending on material grade, manufacturing tolerances, installation method, application, and operating environment.
While Horizon Inc. makes every reasonable effort to ensure the accuracy of the information provided, we make no warranties, express or implied, regarding its completeness, accuracy, or suitability for any particular purpose. Customers are responsible for verifying that the selected product is appropriate for their specific application and operating conditions. Where safety, structural integrity, or regulatory compliance is critical, independent engineering evaluation and product testing should be performed.
Horizon Inc. reserves the right to modify product specifications, dimensions, materials, and technical data without prior notice.
To the fullest extent permitted by applicable law, Horizon Inc. shall not be liable for any direct, indirect, incidental, consequential, or special damages arising from the use of, or reliance upon, the information contained on this website.
Copyright
© 2026 Horizon Inc. All Rights Reserved.
All content, product data, specifications, technical drawings, images, and documents published on this website are the property of Horizon Inc. and may not be reproduced, distributed, modified, or transmitted without prior written permission.
