Heat Set Insert Starter Kit (M2 to M5, 120 pcs)

Name: Heat Set Insert Starter Kit (M2 to M5, 120 pcs)
Brand: OzFDM
SKU: KIT-INSERT-M2M5
Price: 28.95 AUD
Availability: OutOfStock

$28.95 AUD $32.50 AUD

Taxes included. Shipping calculated at checkout.

Out of stock

Everything you need to start adding metal threads to your 3D prints: 120 knurled brass heat set inserts across the sizes makers use most, from M2 for electronics enclosures up to M5 for structural joints.

M2 and M3: 20 M2 Long, 20 M3 Short, 20 M3 Long and 10 M3 Thick
M4: 15 M4 Short and 15 M4 Long
M5: 10 M5 Short and 10 M5 Long

Every piece is the same part we sell individually, bundled together for a cheaper price than buying each size on its own.

Strong Metal Threads for 3D Printed Parts

Screwing straight into plastic works once or twice, then the thread wears out. Heat set inserts fix that: press a knurled brass insert into a printed hole with a soldering iron, the plastic flows around the knurling, and you are left with a metal thread you can assemble and take apart many times.

This kit gives you a working stock of every common size, so you can design with inserts from your very next project.

Why Use Heat Set Inserts

Reusable Threads

Brass threads survive repeated assembly, so lids, access panels and electronics enclosures can be opened and closed without stripping the plastic.

Works With Most Filaments

The knurled brass locks firmly into PLA, PLA+, PETG, ABS, ASA and nylon prints. They are not suitable for cured resin prints, because cured resin does not soften when heated.

Simple to Install

Set your soldering iron to the filament's printing temperature plus 10°C, rest the insert on a hole sized to the chart below and press it in straight and slowly. Let the part cool before tightening a screw into it.

Full Kit Contents

Item	Qty
Brass heat set insert, M2 Long	20
Brass heat set insert, M3 Short	20
Brass heat set insert, M3 Long	20
Brass heat set insert, M3 Thick	10
Brass heat set insert, M4 Short	15
Brass heat set insert, M4 Long	15
Brass heat set insert, M5 Short	10
Brass heat set insert, M5 Long	10

Every item is picked from our regular stock, so you can top up any size from its own product page.

Hole Sizes

Insert	Length	Insert diameter	Hole diameter
M2 Long	3 mm	3.5 mm	3.1 mm
M3 Short	3 mm	4.5 mm	4 mm
M3 Long	5.7 mm	4.6 mm	4 mm
M3 Thick	4 mm	5 mm	4.4 mm
M4 Short	4 mm	6 mm	5.5 mm
M4 Long	8.1 mm	6.3 mm	5.5 mm
M5 Short	6 mm	7 mm	6.2 mm
M5 Long	9.5 mm	7 mm	6.2 mm

Set your soldering iron to the filament's printing temperature plus 10°C and press the insert in straight and slowly.

Frequently Asked Questions

Which screws fit these inserts?

Standard metric machine screws of the same thread size, so M3 inserts take M3 screws. Our M3 Fastener Starter Kit pairs well with the M3 inserts in this kit.

Short, long or thick?

Short inserts suit thin walls and shallow bosses. Long inserts give more thread engagement where there is room for a deeper hole. The M3 Thick insert is wider and 4 mm long, a common size in printer builds.

Can I buy more of one size?

Yes. Every size is available individually from our heat set insert listing, with bulk pricing on larger quantities.