Threaded inserts for plastic engineered to add metal threads to 3D-printed and moulded parts, fitted using heat or ultrasonic methods, Hanglife Threaded Inserts. Secure fastening and repeatable screwings help makers and technicians avoid stripped plastic. Are these M3 inserts the most reliable way to upgrade small assemblies?
⚡ At a Glance
- • Holding Strength: Opposite spiral knurling and brass body resist pull-out and high torque
- • Best for: 3D-printing hobbyists and small-scale manufacturers needing durable M3 threads
- • Not ideal for: Applications requiring thread sizes other than M3 or metal-to-metal load-bearing joints
Brass M3 heat-set inserts seat into blind or through holes using heat or ultrasonic insertion. The knurled spiral design balances tightening torque while the brass construction improves corrosion resistance.
Reliable, repeatable fastening - with knurled spiral brass inserts
Knurled inserts use an opposite spiral-shaped surface that bites into softened thermoplastic when heated or ultrasonically pressed, creating mechanical interlock. The M3 internal thread remains metal-lined so screws engage metal-to-metal rather than cutting into plastic.
Secure assemblies survive repeated removals and re-fittings without stripping threads, making maintenance and upgrades straightforward.
Quick retrofit into printed parts - with heat-set or ultrasonic installation
Installation melts or displaces a small amount of surrounding thermoplastic so the insert seats flush; ultrasonic insertion achieves the same result by vibration. Blind and through-hole placements are both supported.
Fast, tidy installation suits one-off repairs and small production runs, saving time compared with glued or tapped alternatives.
Durable, corrosion-resistant threads - with brass construction
Brass offers good thermal conductivity for reliable heat-setting and strong resistance to corrosion and deformation under common loads. The material withstands repeated torque without brittle failure.
Long-lasting metal threads improve product longevity and reduce rework or part replacement over time.
✨ The 4 Key Reasons for Hanglife Threaded Inserts
- M3 internal thread - Compatible with common M3 fasteners used in electronics and 3D assemblies
- Pack of 100 - Provides stock for multiple projects or small production runs
- Heat-set or ultrasonic fit - Enables fast seating into blind and through holes with minimal finishing
- Brass construction - Maintains thread integrity and resists corrosion over time
📋 Technical Details at a Glance
- Category: Threaded inserts for plastic
- Material: Brass
- Internal thread: M3
- Outer width: 5 mm
- Length: 4.0 mm
❓ Frequently Asked Questions
Q: Are these inserts suitable for PLA and PETG prints?
A: Yes, compatibility explicitly includes PLA and PETG, along with ABS, PPS, PP and other thermoplastics.
Q: How are the inserts installed?
A: Installation is by heat-setting or ultrasonic insertion, embedding the knurled brass into blind or through holes.
Q: What size and quantity are included?
A: The set contains 100 inserts with an M3 internal thread, approximately 5 mm outer width and 4.0 mm length.
🏆 Our Verdict
Hanglife Threaded Inserts suit makers, repair technicians and small manufacturers who need reliable M3 threads in plastic parts. The combination of knurled brass construction and heat-set or ultrasonic installation delivers repeatable, corrosion-resistant threads that stand up to regular use. While upfront choices vary by project, durable metal threads reduce long-term rework and extend the life of assemblies.
