---
product_id: 599418785
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: "¥5213"
currency: JPY
in_stock: true
reviews_count: 8
category: "Ktehloy"
url: https://www.desertcart.jp/products/599418785-400pcs-metric-heat-set-insert-m2-m2-5-m3-m4
store_origin: JP
region: Japan
---

# Heat resistant >300°C 400 precision 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:** ¥5213
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your 3D prints with pro-grade brass inserts—because your projects deserve the best!

## 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?** ¥5213 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/599418785-400pcs-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

- • **Effortless Installation:** Compatible with heat-set, ultrasonic, or injection molding methods—perfect for 3D printing and electronics.
- • **Premium Brass Durability:** Corrosion-resistant and built to withstand extreme heat up to 572°F for lasting reliability.
- • **Massive 400-Piece Assortment:** All essential M2 to M6 sizes in one kit—never run out mid-project.
- • **Precision Threading & Knurling:** Smooth, fine ISO metric threads with 45° angled knurling for unbeatable grip and torque resistance.
- • **Universal Thermoplastic Compatibility:** Works seamlessly with PLA, PETG, ABS, and more—ideal for prototyping, automotive, and tech gear.

## Overview

This 400-piece kit of M2 to M6 brass threaded inserts offers high-precision, heat-resistant, and corrosion-proof fastening solutions tailored for plastic and 3D printed components. Featuring smooth ISO metric threads and 45° knurled surfaces, these inserts ensure superior torque resistance and durability across a wide range of thermoplastics, making them the go-to choice for engineers, makers, and tech professionals.

## 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): desertcart.com: Industrial & Scientific

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.
Review: Great assortment in one kit - Bought these for some 3d prints I made and they worked beautifully. Be sure to buy the heated inserter though, as well as the various sized tips for it. This make installation almost foolproof. Great quality and a good quantity in this kit.

## 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 | #1,606 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Nut Inserts |
| Brand | Ktehloy |
| Color | golden |
| Compatible Groove Diameter | 2 Millimeters |
| Customer Reviews | 4.8 4.8 out of 5 stars (575) |
| Drive Style | Spline |
| Exterior Finish | Brass |
| Fastener Type | Insert |
| Finish Types | Unfinished |
| Grade Rating | Industrial |
| Inside Thread Size | M2 M2.5 M3 M4 M5 M6 |
| Item Diameter | 2 Millimeters |
| Item Dimensions | 6.85 x 3.86 x 0.67 inches |
| Manufacturer | Ktehloy |
| Material Type | Brass |
| Maximum Shear Strength | [HIGH] |
| Metal Type | Brass |
| Model | Threaded Inserts Kit (400Pcs) |
| Number of Pieces | 400 |
| Part Number | ket-1 |
| Screw Head Style | Flat |
| Set Name | M2 M2.5 M3 M4 M5 M6 (400 Piece) |
| Size Name | M2 M2.5 M3 M4 M5 M6 |
| Thread Class | Fine |
| 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

- **Color:** golden
- **Exterior Finish:** Brass
- **Fastener Type:** Insert
- **Material:** Brass
- **Thread Size:** M2 M2.5 M3 M4 M5 M6

## 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)

## Available Options

This product comes in different **Model** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great inserts. Smooth threads.
*by N***. on October 28, 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 assortment in one kit
*by C***G on November 8, 2025*

Bought these for some 3d prints I made and they worked beautifully. Be sure to buy the heated inserter though, as well as the various sized tips for it. This make installation almost foolproof. Great quality and a good quantity in this kit.

### ⭐⭐⭐⭐⭐ Awesome inserts
*by A***R on December 22, 2025*

The sizing is accurate, all are machined properly, and they go in and more importantly stay in. Threading is smooth and the small lip at the bottom does a great job at holding it in place when setting them. Will definitely buy these again when I need more.

## Frequently Bought Together

- 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
- Kadrick Metric Screw Assortment, 2000PCS Metric Bolt Assortment Kit M2 M3 M4 M5 Machine Screws with Lock & Flat Washers, Grade 10.9 Alloy Steel Hex Socket Button Head Black Screws Nuts and Bolts Kit
- 3DZWMAN Vertical Heat Pressing Machine,Heat Set Insert Tool,Brass Inserts 3D Printing,Heat Set Insert tip for Thread Knurled Nut M2/M3/M4/M5/M6(1/4)/M8

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/599418785-400pcs-metric-heat-set-insert-m2-m2-5-m3-m4](https://www.desertcart.jp/products/599418785-400pcs-metric-heat-set-insert-m2-m2-5-m3-m4)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-05-11*