---
product_id: 770169183
title: "400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket)"
brand: "ktehloy"
price: "$128.45"
currency: USD
in_stock: true
reviews_count: 5
category: "Ktehloy"
url: https://www.desertcart.ec/products/770169183-400pcs-metric-heat-set-insert-m2-m2-5-m3-m4
store_origin: EC
region: Ecuador
---

# Heat resistant >300°C 400 precision brass inserts 45° knurled torque grip 400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket)

**Brand:** ktehloy
**Price:** $128.45
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your 3D prints with brass precision that lasts!

## Quick Answers

- **What is this?** 400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) by ktehloy
- **How much does it cost?** $128.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/770169183-400pcs-metric-heat-set-insert-m2-m2-5-m3-m4)

## Best For

- ktehloy enthusiasts

## Why This Product

- Trusted ktehloy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Premium Brass Durability:** Corrosion-resistant and built to withstand extreme heat up to 300°C without deformation.
- • **Massive 400-Piece Assortment:** All essential M2 to M6 sizes for every 3D printing and plastic fastening need.
- • **Precision Threading & Knurling:** Engineered with clear threads and 45° angled knurling for unbeatable torque resistance and no slippage.
- • **Effortless Heat-Set Installation:** Easily installed with a soldering iron or ultrasonic methods—no countersinking required.
- • **Universal Thermoplastic Compatibility:** Perfect for PLA, PETG, ABS, and more—ideal for 3D prints, electronics, automotive plastics, and beyond.

## Overview

This Ktehloy 400-piece metric heat set insert kit features high-quality brass threaded inserts in sizes M2 through M6. Designed for plastic and 3D printing components, these inserts offer exceptional thermal resistance above 300°C, corrosion resistance, and precision knurled threading for superior torque and durability. Easy to install via heat or ultrasonic methods, they are compatible with a wide range of thermoplastics, making them the go-to solution for professional-grade fastening in prototyping, electronics, and automotive applications.

## Description

Ktehloy 400Pcs Threaded Inserts, M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit, Brass Heat Set Insert for Plastic and 3D Printing Components (Threaded Inserts Ket)

Review: Perfect 3M inserts for plastic or wood. - These were the perfect M3 threaded inserts for the printed parts I made for my 3D printer, Over time threads in Plastic will fail. I don't see these ever failing from use.
Review: Great inserts. Smooth threads. - M4 seems to be my go to size when I'm using threaded inserts. This pack was a great replacement for the lack of M4s on my workbench. I used them to finish a recent project of attaching a foot to a base for my leg lamp. It worked wonderfully and the price per piece was a nice value. Easy to install and very smooth threads.

## Features

- 【Package Content】- The package includes 400 high-quality metric threaded inserts for plastic heat-setting. With a large quantity available, it meets the needs for connecting numerous 3D printing accessories. The threaded brass inserts are approximately sized at M2 M2.5 M3 M4 M5 M6. Please ensure the nut's size matches your plastic parts effectively.
- 【High-Quality Threaded Inserts】- Crafted from top-tier brass materials, these threaded inserts boast outstanding thermal conductivity, corrosion resistance, and durability. They exhibit remarkable resistance against breakage and deformation. Withstanding temperatures exceeding 300°C / 572°F, they easily endure the harsh heat generated during plastic thermal shaping processes.
- 【Precision Craftsmanship】- High-precision and clear threading ensures stability and reliability, preventing thread slippage during rotation. The 45-degree angled knurling significantly enhances torque resistance and tensile strength, ensuring a stronger fastening. The embedded nuts feature guiding elements, eliminating the need for countersinking or recessing, making your work more convenient and efficient.
- 【Easy to Use】- Brass threaded inserts can be installed into components of a 3D printer through heating or ultrasonic methods, or molded during the injection process. They are also suitable for circuit board assembly and the electronics field. With a common soldering iron, you can easily place them into the holes of 3D prints.
- 【Wide Application】 - These inserts are designed for use with all thermoplastics, including materials like PLA, PETG, ABS, PPS, PP, and others. Whether installing them in 3D printed objects, injection-molded plastic parts, automotive plastic casings, or laptop shells, these inserts offer reliable and durable solutions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CLKDPN65 |
| Best Sellers Rank | #72,645 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #135 in Hardware Nuts |
| Brand | Ktehloy |
| Colour | golden |
| Compatible Groove Diameter | 2 Millimeters |
| Country Of Origin | USA |
| Customer Reviews | 4.8 out of 5 stars 609 Reviews |
| Drive Style | Spline |
| Exterior Finish | Brass |
| Fastener Type | Insert , Knurled |
| Finish Types | Unfinished |
| Grade Rating | industrial |
| Inside Thread Size | M2, M2.5, M3, M4, M5, M6 |
| Item Diameter | 2 Millimetres |
| Item Dimensions | 17.4 x 9.8 x 1.7 Centimeters |
| Manufacturer | Ktehloy |
| Material | Brass |
| Material Type | Brass |
| Maximum Shear Strength | [HIGH] |
| Metal Type | Brass |
| Model | Threaded Inserts Kit (400Pcs) |
| Number Of Items | 400 |
| Number of Pieces | 400 |
| Part Number | ket-1 |
| Screw Head Style | Flat |
| Set Name | Metric Threaded Inserts Assortment Kit |
| Size Name | M2 M2.5 M3 M4 M5 M6 |
| Thread Class | Coarse |
| Thread Coverage | Fully Threaded |
| Thread Size | M2 M2.5 M3 M4 M5 M6 |
| Thread Style | Right Hand |
| Thread Type | Iso Metric |
| UPC | 726929215744 |
| Unit Count | 400.0 Count |

## Product Details

- **Brand:** Ktehloy
- **Colour:** golden
- **Exterior Finish:** Brass
- **Fastener Type:** Insert, Knurled
- **Inside Thread Size:** M2, M2.5, M3, M4, M5, M6
- **Item dimensions L x W x H:** 17.4 x 9.8 x 1.7 Centimeters
- **Material:** Brass
- **Metal Type:** Brass
- **Thread Size:** M2 M2.5 M3 M4 M5 M6
- **Thread Type:** Iso Metric

## Images

![400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) - Image 1](https://m.media-amazon.com/images/I/91HQ1Owy3rL.jpg)
![400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) - Image 2](https://m.media-amazon.com/images/I/71QuYMyp7zL.jpg)
![400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) - Image 3](https://m.media-amazon.com/images/I/81biAKkWHLL.jpg)
![400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) - Image 4](https://m.media-amazon.com/images/I/71T-xU0bwsL.jpg)
![400Pcs Metric Heat Set Insert, M2 M2.5 M3 M4 M5 M6 Female Thread Knurled Nuts Assortment Kit, Brass Threaded Inserts for Plastic and 3D Printing Components (Threaded Inserts Ket) - Image 5](https://m.media-amazon.com/images/I/71AxUn6X9AL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect 3M inserts for plastic or wood.
*by E***8 on 30 March 2026*

These were the perfect M3 threaded inserts for the printed parts I made for my 3D printer, Over time threads in Plastic will fail. I don't see these ever failing from use.

### ⭐⭐⭐⭐⭐ Great inserts. Smooth threads.
*by N***. on 28 October 2025*

M4 seems to be my go to size when I'm using threaded inserts. This pack was a great replacement for the lack of M4s on my workbench. I used them to finish a recent project of attaching a foot to a base for my leg lamp. It worked wonderfully and the price per piece was a nice value. Easy to install and very smooth threads.

### ⭐⭐⭐⭐⭐ Great little kit
*by C***L on 1 May 2026*

Very nice set. Worked well.

## Frequently Bought Together

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-07-07*