What size heat set insert should I choose for my 3D printed part?

Match the insert's thread size to the screw you plan to use (e.g., an M3 insert for an M3 bolt). Check the insert's outer diameter against the boss or hole designed into your print; the hole should be slightly smaller than the insert's larger knurled diameter for a secure melt-in fit. This kit includes M2, M2.5, M3, M4, M5, M6 (1/4), and M8 sizes, with specific dimensions listed in the product details.

How are these heat set inserts installed?

Heat set inserts are installed by pressing them into a thermoplastic part using a soldering iron fitted with a compatible tip. The iron briefly melts the surrounding plastic, allowing the insert to seat flush. As the plastic cools, it reflows around the knurls, locking the insert in place and providing durable metal threads. This kit includes various insert tips and a digital soldering iron.

Can I use this tool with different types of 3D printing filament?

Yes, this tool is designed for use with common thermoplastics like PLA, ABS, and PETG. The adjustable temperature control on the soldering iron (180℃-500℃) allows you to fine-tune the heat for optimal melting and bonding with different plastic types, ensuring a secure fit for the brass inserts.

How many inserts are included in the kit?

The kit includes a total of 370 brass threaded insert nuts. These are provided in assorted metric sizes: M2 (50pcs), M2.5 (100pcs), M3 (100pcs), M4 (50pcs), M5 (40pcs), M6 (10pcs), 1/4-20 (10pcs), and M8 (10pcs), offering a comprehensive selection for various projects.

What is the advantage of using brass heat set inserts?

Brass inserts offer excellent corrosion resistance and durability, ensuring long-lasting metal threads that are superior to plastic threads. Their knurled exterior provides a strong grip when melted into the plastic, preventing pull-out and stripping, which is crucial for components that require frequent assembly or disassembly.

How do I ensure the inserts are installed straight?

The 3DZWMAN tool features a stable, all-metal construction with a widened aluminum profile and V-shaped pulleys designed to guide the insertion process. This setup helps maintain a 90° vertical insertion angle, ensuring the inserts are seated correctly and securely without tilting.

How to choose the right heat set insert for my project?

Consider the screw size you intend to use for thread compatibility (e.g., M3 screw needs an M3 insert). Also, check the insert's outer diameter against the hole size in your 3D print; the hole should be slightly smaller than the insert's diameter for a tight fit. The kit includes a range of sizes from M2 to M8 to accommodate most common applications.

3DZWMAN Heat Set Insert Tool Kit 370PCS Brass M2-M8

Name: 3DZWMAN Heat Set Insert Tool Kit with 370PCS Brass Inserts & Soldering Iron | M2-M8 Thread Sizes
Brand: 3DZWMAN
SKU: hrt5141
Price: 8835.00 INR
Availability: InStock

About this item

The 3DZWMAN Heat Set Insert Tool Kit provides a stable and efficient method for creating durable metal threads in plastic components. Its all-metal construction, reinforced with aluminum profiles and V-shaped pulleys, ensures precise 90° vertical insertion. The included digital soldering iron features auto-voltage conversion (110V/220V) and adjustable temperature control from 180℃ to 500℃, making it suitable for various plastic types and ensuring optimal melt-in performance.

This comprehensive kit contains 370 brass threaded insert nuts in a wide range of metric sizes, including M2, M2.5, M3, M4, M5, M6 (1/4), and M8. Each size is designed with a knurled exterior for maximum grip and pull-out resistance once melted into the plastic. The kit also includes various insert tips compatible with standard ceramic tube soldering irons, facilitating easy installation for different thread sizes and depths.

For Indian makers and hobbyists, this kit offers a professional-grade solution for enhancing the durability and functionality of 3D printed projects. It simplifies the process of adding strong, reliable metal threads, which are crucial for assembling enclosures, mounting components, or creating reusable connections. All customs duties and GST are included in the displayed price, with delivery via ExpressBox tracked shipping.

Key Features

The base is made by bending and welding sheet metal, and reinforced welding is added at the bottom, equipped with anti slip foot pads. The Z-axis is a widened 2040 aluminum profile, which provides sufficient strength when the structure is pressed down. Three large V-shaped pulleys are tightly matched with the 2040 aluminum profile, and only one V-shaped pulley needs to be adjusted to clamp the aluminum profile. The metal tension spring can be used repeatedly without deformation, and it is easier to adjust the insertion height by hand tightening the nut
The digital soldering iron supports automatic voltage conversion of 110V/220V. Long press the # switch, with a temperature range of 180 ℃ (356 ℉) -500 ℃ (932 ℉). Long press the+- button to continuously adjust the temperature, and comes with a soldering iron tip and silicone protective cover
Insert Tips M2 M2.5 M3 M4 M5 M6 (1/4) M8 can match the electric soldering iron of ceramic tube D4xL24 on the market
The Kit including 370Pcs threaded insert nuts, M2x3LxD3.2-50pcs M2.5xL4xD4-100pcs M3xL4xD4.2-100pcs M4xL4xD5-50pcs M5xL5xD7-40pcs M6xL6xD8-10pcs 1/4-20xL6xD8-10pcs M8xL8xD10-10pcs
It can be used for 3D printing Heat-Set Insert Installation and plastic parts to keep 90° vertical insertion

Why choose this product

Precision Threading for 3D Prints

This kit is engineered to provide professional-grade metal threads in your 3D printed projects. Unlike basic screw-in methods, the heat-set process melts the plastic around the knurled brass insert, creating a robust, high-torque connection that won't strip easily. The stable insertion mechanism ensures a perfect 90° angle every time, vital for structural integrity and ease of assembly. This means your enclosures will be more secure, your components mount reliably, and your creations will withstand repeated use without wear on the plastic threads.

Ideal for Makers & Prototypers

This kit is perfect for hobbyists, makers, and small-scale manufacturers in India looking to elevate their 3D printing projects. If you frequently assemble plastic parts, create enclosures for electronics, or build functional prototypes, this tool will significantly improve the durability and professional finish of your work. Those who need to frequently disassemble and reassemble projects will benefit most. However, if your projects only require occasional assembly or involve very thin plastic walls where heat might cause deformation, consider simpler screw-in nuts or adhesive solutions.

How to use

Ensure your 3D printed part has pre-drilled holes designed for heat set inserts. The hole diameter should be slightly smaller than the insert's outer diameter for a snug fit. Clean any debris from the holes. — Prepare the Plastic Part
Select the appropriate insert tip for your chosen brass insert size. Attach it to the digital soldering iron and set the temperature between 180℃-500℃, adjusting based on the plastic type (e.g., lower for PLA, higher for ABS). Allow it to heat up. — Set Up the Soldering Iron
Align the brass insert with the pre-drilled hole, ensuring it's perfectly vertical. Gently press the heated soldering iron tip onto the insert. Apply steady, even pressure until the insert is seated flush with the plastic surface. Avoid excessive heat to prevent melting the plastic excessively. — Install the Insert
Allow the plastic to cool and solidify around the insert. Once cooled, carefully remove the soldering iron. Test the thread by screwing in the appropriate machine screw to ensure a secure and smooth fit. Repeat for all required inserts. — Cool and Test

Example scenarios

Typical situations where 3DZWMAN Heat Set Insert Tool Kit with 370PCS Brass Inserts & Soldering Iron | M2-M8 Thread Sizes helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A maker in Bangalore needs to assemble an electronics enclosure for a Raspberry Pi project that requires frequent access for maintenance.

How this product helps

This kit provides M2.5 and M3 brass inserts, perfect for securing the enclosure panels. The heat-set installation creates durable metal threads that withstand repeated screw tightening and loosening, unlike plastic threads which can strip easily, ensuring the enclosure remains secure over time.

Scenario 2

Illustrative example

Where it helps

A hobbyist in Delhi is designing a custom drone frame and needs strong, reliable mounting points for motors and landing gear.

How this product helps

Using the M4 and M5 brass inserts from this kit, the drone frame can be reinforced with robust metal threads. The knurled design ensures excellent pull-out strength, crucial for components under stress, and the precise 90° insertion guarantees structural integrity for safe flight.

Specifications & installation

Specifications

Soldering Iron Power	60W
Soldering Iron Temperature Range	180℃ - 500℃ (356℉ - 932℉)
Soldering Iron Voltage	110V/220V (Auto-Voltage Conversion)
Insert Material	Brass
Insert Knurl Type	Knurled
Total Inserts	370 Pieces
Insert Sizes Included	M2, M2.5, M3, M4, M5, M6 (1/4), M8

Installation & usage

Installation Method	Heat pressing with soldering iron and specialized tip
Insertion Angle	90° Vertical
Suitable Plastics	Thermoplastics (e.g., PLA, ABS, PETG)
Cost per use	370 inserts in kit — ₹23.88 per insert
Shelf life after opening	Indefinite (store in dry conditions)
Contraindications	Not suitable for thermosetting plastics; requires careful temperature control to avoid melting plastic excessively.

How we compare

Feature	3DZWMAN Heat Set	Others
Thread Sizes Included	Comprehensive M2-M8 metric set (370 pcs)	Varies by brand; often limited to M3/M4, fewer pieces
Installation Tool	Auto-voltage (110/220V) digital soldering iron with temp control	Basic soldering iron or manual press; may require separate purchase
Insert Material	High-quality Brass with knurled grip	Brass or sometimes aluminum; knurl pattern varies
Construction Stability	All-metal, reinforced aluminum profile for 90° insertion	Often plastic base or less stable metal frames
Cost per Insert	370 inserts — ₹23.88 per insert	Local kits often ₹1000-₹2500 for ~100-200 inserts

SKU	hrt5141
GTIN	0720118893782
Brand	3DZWMAN
Model Number	ZW12Pro
Set Name	Heat Set Insert Tool Kit (370 Piece)
Material	Aluminum, Brass
Exterior Finish	Aluminum
Color	ZW12+
Item Weight	1.31 kg (2.89 lb)
Item Dimensions	10.16 cm L x 19.7 cm W x 11.69 cm H (4 in L x 7.76 in W x 4.6 in H)
Package Weight	1.53 kg (3.37 lb)
Package Dimensions	20.4 cm L x 5.4 cm W x 30.6 cm H (8.03 in L x 2.13 in W x 12.05 in H)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

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3DZWMAN Heat Set Insert Tool Kit with 370PCS Brass Inserts & Soldering Iron | M2-M8 Thread Sizes

Product details

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