Threaded Inserts (Knurled Brass Threaded Heat Insert)
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Product Features
- High quality Brass inserts
- Sold individually
- Sizes available suit most 3D print files available
Bulk Discounts
- Order 100 Inserts per size and get 10% off
- Order over 1000 Inserts total and get 20% off
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Knurled Brass Threaded Heat Insert
OzFDM Threaded Inserts
When strength and precision matter, OzFDM’s Knurled Brass Threaded Heat Inserts provide the perfect solution for embedding strong, reusable metal threads into 3D-printed parts.
Engineered for reliability and performance, these inserts are designed to withstand repeated use, giving your prints the professional durability they deserve.
Small Parts. Serious Strength.
Made from high-quality brass with precision knurling, they offer excellent grip, thermal conductivity, and long-term stability in both plastic and resin components.
Ideal for applications where fasteners need to be tightened, loosened, or replaced, these inserts ensure your prints stay secure and maintain their dimensional integrity. Whether you’re assembling enclosures, mechanical parts, or functional prototypes, OzFDM’s brass inserts make it easy to achieve clean, strong, and professional fastening every time.
Reliable Inserts for Every Project
Build With Confidence – Threaded Insert Range
Explore our full range of Knurled Brass Threaded Heat Inserts, displayed below for easy comparison.
Each size is precision-machined to deliver a perfect fit and professional finish — whether you need extra length, thicker walls, or micro-sized inserts for compact builds.
From M2 to 1/4”, every insert in our collection is clearly labelled and visually represented, so you can identify the ideal option at a glance and achieve a flawless result in your next project.
Built to Bond, Made to Last
Compatible, Reliable, and Ready to Perform
OzFDM’s brass inserts are ideal for use with a wide range of 3D-printing materials, including PLA, PLA+, PETG, ABS, and Nylon, offering strong bonding performance across both high- and low-temperature plastics. The knurled geometry and low-friction surface make them easy to install and even easier to align straight for a perfect finish.
Whether you’re prototyping, upgrading parts, or building end-use products, these inserts deliver a professional-grade fastening solution that enhances both the look and longevity of your printed projects.
Built for Strength and Longevity
Exceptional Holding Power
Each insert features a precision knurled exterior that locks tightly into the plastic when heat-set, creating a permanent mechanical bond. The deep ridges grip firmly into your printed part, preventing pull-out or rotation under stress.
With their corrosion-resistant brass construction, these inserts maintain excellent thread integrity even after countless assembly cycles.
Perfect Fit for Every Project
OzFDM offers a comprehensive range of insert sizes to suit M2 through M8 threads (and 1/4"), ensuring compatibility across most 3D-printing materials and project types.
Whether you’re reinforcing small brackets or building robust mechanical joints, you can find the right length and diameter to fit perfectly within your design. Each size is carefully tested for precise tolerances, delivering a consistent fit that eliminates trial and error.
Professional Results, Simple Installation
Installing heat inserts is quick and reliable, simply heat your soldering iron to the recommended temperature and press the insert into a slightly undersized hole. As the brass conducts heat, it melts the surrounding plastic, allowing the knurling to embed smoothly and solidify into place.
Once cooled, the result is a clean, flush, and permanent thread that looks as professional as it performs.
Threaded Inserts Technical Specifications
Threaded Inserts are knurled brass inserts that provide an efficient and secure way to affix an item to another. With its heat-set construction, the insert maintains a secure and reliable hold for arts and crafts, furniture, and other 3D printed objects.
For easy installation set the Soldering Iron to the filament printing temperature +10° Celsius.
Type
M2 Long
M2.5 Long
M3 Short
M3 Thick
M3 Long
M4 Short
M4 Long
M5 Short
M5 Long
M6 Short
M6 Long
M8 Long
1/4 Long
Length
3 mm
4 mm
3 mm
4 mm
5.7 mm
4 mm
8.1 mm
6 mm
9.5 mm
8 mm
12 mm
12 mm
12.7 mm
Insert ∅
3.5 mm
4.5 mm
4.5 mm
5 mm
4.6 mm
6 mm
6.3 mm
7 mm
7 mm
8 mm
8 mm
10 mm
8 mm
Tip ∅
3 mm
3.9 mm
3.9 mm
4.3 mm
3.9 mm
5.4 mm
5.4 mm
6.1 mm
6.1 mm
7 mm
7 mm
9 mm
7.2 mm
Hole ∅
3.1 mm
4mm
4 mm
4.4 mm
4 mm
5.5 mm
5.5 mm
6 . 2 mm
6.2 mm
7.1 mm
7.1 mm
9.1 mm
7.3 mm