Nut Insert Semi Hex Reduced Flange Technical Datasheet
Open and Closed End
Product Overview
The Semi Hex Body Reduced Flange Nut Insert is a blind-installed threaded insert designed to provide strong, reusable threads in thin sheet metal, tubes, and hollow sections where access is available from only one side. The semi-hexagonal body offers increased resistance to rotation compared to round body inserts.
This datasheet covers both Open End and Closed End Semi Hex Body Reduced Flange Nut Inserts. The open-end version allows screws to pass completely through the insert, whereas the closed-end version seals the internal threads, preventing the ingress of dust, moisture, fluids, and contaminants while protecting the threads from corrosion.
Available in Steel and Stainless Steel, these nut inserts are widely used in sheet metal fabrication, electrical enclosures, automotive assemblies, HVAC equipment, machinery, furniture, and industrial equipment.
Table of Contents
Standards
Manufacturers Standard
Installation
Dimensions
Open End Semi Hex Reduced Flange Nut Insert
ITEM CODE: 4055
Open End Nut Inserts allow screws or threaded rods to pass completely through the insert, making them suitable for through-hole assemblies and applications requiring longer fasteners.
| Size | Grip Range | A | Hole Size +0.1 | D +0.07, -0.1 | B | K | L |
|---|---|---|---|---|---|---|---|
| M3 – Gr 1 | 0.5-1.5 | 5.2 | 5 | 4.9 | 6 | 0.5 | 9 |
| M3 – Gr 2 | 1.5-2.5 | 11 | |||||
| M4 – Gr 1 | 0.5-2.0 | 8 | 6 | 5.9 | 7 | 0.5 | 12 |
| M4 – Gr 2 | 2.0-4.0 | 14 | |||||
| M5 – Gr 1 | 0.5-2.5 | 8.2 | 7 | 6.9 | 8 | 0.5 | 13 |
| M5 – Gr 2 | 2.0-4.0 | 15 | |||||
| M6 – Gr 1 | 1.0-3.0 | 10.7 | 9 | 8.9 | 10 | 0.6 | 16 |
| M6 – Gr 2 | 3.5-5.0 | 18 | |||||
| M8 – Gr 1 | 1.0-3.5 | 11.2 | 11 | 10.9 | 12 | 0.65 | 18 |
| M8 – Gr 2 | 3.5-5.0 | 20 | |||||
| M10 – Gr 1 | 1.0-4.0 | 13.5 | 13 | 12.9 | 14 | 0.75 | 21 |
| M10 – Gr 2 | 3.5-5.0 | 23 | |||||
| M12 – Gr 1 | 1.0-4.0 | 14.8 | 16 | 14.9 | 17.6 | 0.8 | 24 |
| M12 – Gr 2 | 4.0-6.0 | 28 |
Closed End Semi Hex Reduced Flange Nut Insert
ITEM CODE: 4062
Closed End Nut Inserts feature a sealed bottom that prevents screw penetration beyond the insert. They are ideal where moisture, dust, oil, or contaminants must be prevented from entering the assembly or where blind fastening is required.
| Size | Grip Range | A | Hole Size +0.1 | D +0.07, -0.1 | B | K | L |
|---|---|---|---|---|---|---|---|
| M4 – Gr 1 | 0.5 – 2.0 | 11.5 | 6 | 5.9 | 7 | 0.6 | 16.7 |
| M4 – Gr 2 | 2.0 – 4.0 | 11.5 | 6 | 5.9 | 7 | 0.6 | 18 |
| M5 – Gr 1 | 0.5 – 2.5 | 13.5 | 7 | 6.9 | 8 | 0.6 | 20 |
| M5 – Gr 2 | 2.5 – 4.5 | 13.5 | 7 | 6.9 | 8 | 0.6 | 23 |
| M6 – Gr 1 | 0.5 – 3.0 | 15.8 | 9 | 8.9 | 10 | 0.6 | 22.5 |
| M6 – Gr 2 | 3.0 – 5.5 | 15.8 | 9 | 8.9 | 10 | 0.6 | 23.5 |
| M8 – Gr 1 | 1.0 – 3.5 | 18.2 | 11 | 10.9 | 12 | 0.7 | 24 |
| M8 – Gr 2 | 3.5 – 5.5 | 18.2 | 11 | 10.9 | 12 | 0.7 | 25 |
| M10 – Gr 1 | 1.0 – 4.0 | 23.2 | 13 | 12.9 | 14.5 | 0.85 | 30.5 |
| M10 – Gr 2 | 4.0 – 6.0 | 23.2 | 13 | 12.9 | 14.5 | 0.85 | 30.5 |
| M12 – Gr 1 | 4.0 – 6.5 | 22.5 | 16 | 15.9 | 17.5 | 1 | 32.5 |
| M12 – Gr 2 | 6.5 – 8.5 | 22.5 | 16 | 15.9 | 17.5 | 1 | 35 |
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 | Semi Hex Body |
| Flange Style | Reduced Flange |
| End Style | Open End / Closed End |
| Thread Type | ISO Metric, UNC (on request with MoQ) |
| Metric Thread Sizes | M3-M12 |
| 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
- Blind installation from one side of the workpiece
- Provides strong reusable internal threads
- Reduced flange offers a cleaner, lower-profile appearance
- Suitable for thin sheet materials
- No welding required
- Fast installation with standard nut insert tools
- Excellent pull-out and spin-out resistance when correctly installed
- Available in both open and sealed end configurations
- Compatible with steel, stainless steel, aluminium and other sheet materials
- Available in steel and stainless steel for various environmental conditions
Frequently Asked Questions
What is the difference between Open End and Closed End Nut Inserts?
An Open End Nut Insert allows the screw to pass completely through the insert, making it suitable for through-hole applications. A Closed End Nut Insert has a sealed bottom that prevents screw penetration and helps protect the assembly from moisture, dust, and contaminants.
Why choose a Semi Hex Body over a Round Body?
The semi-hex body provides greater resistance to spinning during installation and under service loads compared to a round body.
What is the advantage of a Reduced Flange?
Provides a flush finish.
What materials are available?
They are commonly manufactured in zinc-plated steel and stainless steel.
What installation tool is required?
A manual, pneumatic, battery-operated, or hydraulic nut insert installation tool can be used depending on production volume.
Can these inserts be used in stainless steel sheets?
Yes, provided the correct hole size, grip range, and installation force are used.
Can these be installed from one side only?
Yes. Semi Hex Body Reduced Flange Nut Inserts are blind-installed and require access from only one side of the workpiece.
Which industries commonly use these inserts?
They are widely used in sheet metal fabrication, automotive, electrical enclosures, HVAC equipment, industrial machinery, furniture, transportation and general manufacturing.
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.
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