M3 Heat Set Insert Pack (100 pcs)

M3 Heat Set Insert Pack (100 pcs)

$22.95 AUD $25.00 AUD
Skip to product information
M3 Heat Set Insert Pack (100 pcs)
  • M3 Heat Set Insert Pack (100 pcs)
  • Threaded Inserts (Knurled Brass Threaded Heat Insert) - OzFDM
  • Threaded Inserts (Knurled Brass Threaded Heat Insert) - OzFDM
M3 Heat Set Insert Pack (100 pcs)

M3 Heat Set Insert Pack (100 pcs)

$22.95 AUD $25.00 AUD
Taxes included. Shipping calculated at checkout.
3 left

One hundred M3 knurled brass heat set inserts, split evenly between short and long, for the size that does most of the work in printer mods, electronics enclosures and functional prints.

  • 50 M3 Short: 3 mm long, for thin walls and shallow bosses
  • 50 M3 Long: 5.7 mm long, for deeper holes and more thread engagement

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

The Most Used Insert Size, Ready to Go

M3 is the default thread for 3D printed assemblies: fan mounts, electronics enclosures, printer upgrades and most functional designs you will download or model yourself. This pack keeps plenty of both lengths on the bench so you never have to redesign a part around what is left in the drawer.

M3 Short

At 3 mm long, the short insert fits thin walls, lids and shallow bosses where a long insert would break through.

M3 Long

At 5.7 mm long, the long insert gives more thread engagement and grip in thicker sections and parts that see more load.

Simple to Install

Set your soldering iron to the filament's printing temperature plus 10°C, rest the insert on a 4 mm hole and press it in straight and slowly. Let the part cool before tightening a screw into it.

Full Kit Contents
ItemQty
Brass heat set insert, M3 Short50
Brass heat set insert, M3 Long50

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

Hole Sizes
InsertLengthInsert diameterHole diameter
M3 Short3 mm4.5 mm4 mm
M3 Long5.7 mm4.6 mm4 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?

Any M3 machine screw. Our M3 Fastener Starter Kit has countersunk and button head screws in five lengths to suit.

Building a Voron or another printer that calls for M3 x 5 x 4 inserts?

Those designs use a 5 mm wide, 4 mm long insert, which matches our M3 Thick insert, sold individually on the heat set insert listing.

Need other sizes?

The Heat Set Insert Starter Kit covers M2 to M5 in one box.

You may also like