M6 Self-Tapping Insert with Flange
Flanged self-tapping inserts are threaded inserts that can be installed directly without pre-tapping. Featuring a self-tapping external thread and an integrated flange, they cut their own mating thread during installation while ensuring accurate alignment and controlled insertion depth.
The flange acts as a positive stop, preventing over-insertion and distributing axial loads over a larger surface area. This design improves pull-out strength, enhances joint stability, and provides consistent installation results, even in soft or low-strength base materials.
These inserts are ideal for creating strong, wear-resistant internal threads in materials such as aluminum, magnesium alloys, plastics, wood, and other lightweight or damage-prone substrates. Once installed, they offer excellent resistance to vibration and repeated assembly, making them suitable for automotive, electronics, machinery, and general industrial applications.
Material Selection
Materials for Self-Tapping Inserts
To meet different application requirements and base materials, our self-tapping inserts are manufactured from a range of high-quality materials widely used in the international market.
Common International Materials
- Unhardened Steel – Suitable for general applications.
- Case-Hardened Steel, Zinc-Plated – Heat treated for strength with zinc plating for corrosion protection.
- Case-Hardened Steel, Zinc-Plated with Yellow Chromate – Enhanced corrosion resistance with yellow passivation.
- Stainless Steel – Excellent corrosion resistance for demanding environments.
- Brass – Good machinability and corrosion resistance for light-duty applications.
Materials Commonly Used in China
In the Chinese market, self-tapping inserts are mainly produced from carbon steel and stainless steel, selected according to application strength and environmental requirements.
Carbon Steel (45 or 40Cr)
- Heat treatment: Quenched and tempered to 250–280 HB, with carburized surface.
- Optional material: 1215 carbon steel with color zinc plating.
- Recommended for: Aluminum alloys, copper alloys, plastics, and other low-strength base materials.
Stainless Steel (SUS303 / 304 / 316 / 316L)
- Surface treatment: Passivated for improved corrosion resistance.
- Recommended for: Cast iron and other high-strength engineering materials.
Material Selection Advantage
By offering multiple material options and surface treatments, our self-tapping inserts ensure reliable performance, long service life, and strong thread engagement across a wide range of base materials and industrial applications.
Suggested Products
Self-Tapping Insert with Flange Parameter Table
Metric
|
Internal Thread |
External Thread |
Head Diameter |
Head Thickness |
Length B |
Recommended Tap Drill T |
Minimum Hole Depth L |
||
|
Plastic |
Aluminum |
Iron Steel |
||||||
|
M4 |
M6.5-0.75 |
9 |
1 |
9 |
5.8-5.9 |
6.0-6.1 |
6.1-6.2 |
10 |
|
M5 |
M8-1 |
11 |
1 |
11 |
7.1-7.2 |
7.3-7.5 |
7.5-7.6 |
12 |
|
M6 |
M10-1.5 |
13 |
1.5 |
15.5 |
8.9-9.1 |
9.1-9.3 |
9.3-9.4 |
16 |
|
M8 |
M12-1.5 |
15 |
1.5 |
16.5 |
10.6-10.8 |
11-11.2 |
11.2-11.4 |
17 |
|
M10 |
M14-1.5 |
17 |
1.5 |
19.5 |
12.6-12.8 |
13.0-13.3 |
13.3-13.4 |
20 |
Imperial
|
Internal Thread |
External Thread |
Head Diameter |
Head Thickness |
Length B |
Recommended Tap Drill T |
Minimum Hole Depth L |
||
|
Plastic |
Aluminum |
Iron Steel |
||||||
|
8-32 |
M6.5-0.75 |
9 |
1 |
9 |
5.8-5.9 |
6.0-6.1 |
6.1-6.2 |
10 |
|
10-24 |
M8-1 |
11 |
1 |
11 |
7.1-7.2 |
7.3-7.5 |
7.5-7.6 |
12 |
|
1/4-20 |
M10-1.5 |
13 |
1.5 |
15.5 |
8.9-9.1 |
9.1-9.3 |
9.3-9.4 |
16 |
|
5/16-18 |
M12-1.5 |
15 |
1.5 |
16.5 |
10.6-10.8 |
11-11.2 |
11.2-11.4 |
17 |
|
3/8-16 |
M14-1.5 |
17 |
1.5 |
19.5 |
12.6-12.8 |
13.0-13.3 |
13.3-13.4 |
20 |
Metric
|
Internal Thread |
External Thread |
Head Diameter |
Head Thickness |
Length B |
Recommended Tap Drill T |
Minimum Hole Depth |
|
|
Aluminum |
Iron Steel |
||||||
|
M5 |
M8-11 |
11 |
1 |
8 |
7.4-7.6 |
7.6-7.7 |
9 |
|
M6 |
M10-1.25 |
13 |
1.5 |
9.5 |
9.3-9.5 |
9.5-9.6 |
10 |
|
M8 |
M12-1.5 |
15 |
1.5 |
10.5 |
11.1-11.3 |
11.3-11.5 |
11 |
|
M10 |
M14-1.5 |
17 |
1.5 |
11.5 |
13.1-13.3 |
13.4-15.4 |
13 |
Imperial
|
Internal Thread |
External Thread |
Head Diameter |
Head Thickness |
Length B |
Recommended Tap Drill T |
Minimum Hole Depth |
|
|
Aluminum |
Iron Steel |
||||||
|
10-24 |
M8-1 |
11 |
1 |
8 |
7.4-7.6 |
7.6-7.7 |
9 |
|
1/4-20 |
M10-1.25 |
13 |
1.5 |
9.5 |
9.3-9.5 |
9.5-9.6 |
10 |
|
5/16-18 |
M12-1.5 |
15 |
1.5 |
10.5 |
11.1-11.3 |
1.3-11.5 |
11 |
|
3/8-16 |
M14-1.5 |
17 |
1.5 |
11.5 |
13.1-13.3 |
13.4-15.4 |
13 |
Typical Application Areas
Modern industrial products and equipment require reliable and high-performance fastening solutions to meet increasingly complex structural demands. Many critical components need secure connections, and Locking Inserts Tech applies its expertise to deliver these connections, allowing our customers to focus on the functionality of their products. We cover almost every fastening area-whether in from machinery to structural components. Whatever the application, Locking Inserts Tech provides self-tapping insert solutions or collaborates with you to develop customized designs.
On the following pages, you can explore the areas where our self-tapping inserts are already successfully applied and discover the innovations we have in store.
STRUCTURAL COMPONENTS AND SUPPORTS
Structural and support components require high-strength fastening and sealing solutions. Our self-tapping inserts ensure that parts are securely attached while maintaining necessary hole sealing and anti-loosening performance, guaranteeing long-term stability.
FLUID AND AIR ROUTING
In fluid and pneumatic systems, self-tapping inserts provide high-strength, safe mounting for clamps, brackets, and tubing connections. With deep customer understanding and technical expertise, Locking Inserts Tech is your trusted partner for fluid and air line fastening solutions.
ELECTRIC DRIVE SYSTEMS (EV)
In electric vehicles and electric machinery, self-tapping inserts play a key role in securing drive components. Our innovative solutions not only exceed the standard requirements for electric systems but also improve production efficiency and assembly reliability.
COMBUSTION DRIVE SYSTEMS (ICE)
For traditional combustion engine equipment, self-tapping inserts provide reliable fastening for transmission mounts, engine brackets, wheel hubs, and chassis components. Locking Inserts Tech's extensive knowledge and expertise ensure every critical component is securely connected.
FAQ
Q: What distinguishes flanged self-tapping inserts from standard self-tapping inserts?
A: Flanged inserts feature an integrated flange at the top, providing a larger bearing surface. This improves load distribution, prevents pull-through in soft materials, and simplifies alignment during installation compared to non-flanged variants.
Q: Which materials are most compatible with flanged self-tapping inserts?
A: They are widely used with thermoplastics, aluminum, magnesium, and thin-gauge sheet metals. The flange ensures a strong hold even in materials prone to cracking or deformation under high stress.
Q: Can flanged self-tapping inserts be installed without pre-tapping holes?
A: Yes. The self-tapping threads cut into the substrate during installation, making pre-tapping unnecessary in most cases. However, in extremely hard metals, a pilot hole may still be recommended for optimal torque control.
Q: Can flanged inserts be used for sealing applications?
A: Yes. When paired with appropriate washers or sealing compounds, the flange can assist in creating a leak-resistant seal in fluid or air systems.
Q: How do I choose the correct flanged insert size?
A: Select based on the thread size required for the mating fastener, the thickness and strength of the substrate, and the load requirements. Oversized flanges provide better distribution, while smaller flanges suit confined spaces.
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