# Brass Heat-Set Inserts for Plastic - M3 x 3mm - 50 pack

**Type:** Product page · **SKU:** ADA4256 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/brass-heat-set-inserts-for-plastic-m3-x-3mm-50-pack.html ([markdown](https://core-electronics.com.au/brass-heat-set-inserts-for-plastic-m3-x-3mm-50-pack.html.md))

Wanna improve the connection strength between your project's 3D-printed parts, and also have nice clean surfaces? Instead of gluing bits together, or screwing plastic...

## Pricing

- **Price:** $12.15 (inc GST) — $11.05 AUD, exc GST
- **Quantity discounts:** 10+ $10.72 (exc GST) · 50+ $10.49 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 18 and Aug 24.

## Description

Wanna improve the connection strength between your project's 3D-printed parts, and also have nice clean surfaces? Instead of gluing bits together, or screwing plastic screws directly into your 3D prints, use strong and reusable machine screws and heat-set inserts. Heat set inserts are only a few cents a piece and have a grooved outside, with theads on the inside. Originally they were designed for injection molded parts but they work fabulously for 3D printed plastic as well.

You could use a plain soldering iron to try to heat-press these in - Heat up the iron and use it to press the insert in, wait for it to cool, then use like a hex nut that's embedded inside the plastic. [**Adafruit strongly recommend Adafruit's heat-set insert tool for soldering irons** ](https://core-electronics.com.au/heat-set-insert-for-soldering-irons-4-40-m3-inserts.html)because it's really hard to insert them straight otherwise and you risk damaging your print!

[Check out this video from Noe & Pedro that shows you how to do it](https://youtu.be/AJ9JT_pHqAw?t=1944)

Comes as a 50 pack of M3-threaded inserts that are 3mm long with a 4.5mm outer diameter.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/2/4256-03.jpg)