The M3 Brass Nut Insert Hot Melt Knurled Thread Heat Embedment Copper Nut is a durable, precision-engineered fastener designed to provide strong, threaded connections in 3D printed or plastic components. Manufactured from premium-quality brass, this insert ensures excellent grip, high hardness, and corrosion resistance, making it ideal for professional and DIY 3D printing projects.

Its knurled outer surface provides superior mechanical anchoring when embedded using heat or ultrasonic installation methods, ensuring a tight and secure hold even under mechanical stress or vibration. Perfect for use in PLA, ABS, PETG, and nylon 3D prints, it helps create reliable threaded holes for repeated screw installation without damaging the printed part.

Features:

• High-quality brass construction — strong, rust-proof, and corrosion-resistant

• Thread Size: M3 — perfect for medium-sized electronic or mechanical assemblies

• Outer Diameter: 4.5mm, Length: 5mm

• Knurled outer design for superior grip and torque resistance

• Easy heat embedment — simply melt into plastic using a soldering iron

• No need for countersinking or flaring — built-in pilot guide ensures correct alignment

• Excellent heat resistance and wear resistance for long-lasting performance

• Suitable for injection molding, ultrasonic embedding, or hot pressing

• Provides strong, reusable threads for plastic and 3D printed components

• Ideal for electronics enclosures, mechanical parts, robotics, and prototypes

• Ensures secure, vibration-proof fastening even under mechanical load

Specifications:

• Thread Size: M3

• Material: High-strength Brass

• Color: Brass / Gold tone

• Outer Diameter (OD): 4.5mm

• Length: 5mm

• Installation Method: Heat set, ultrasonic embed, or molded during injection

• Temperature Resistance: High (suitable for PLA, ABS, PETG, Nylon)

• Hardness: High, non-deformable

• Corrosion Resistance: Rust-proof and acid-resistant

• Usage: 3D printed parts, plastic enclosures, injection-molded components

How to Use:

• Drill or design a hole slightly smaller than the outer diameter of the insert (about 4.3mm for M3).

• Heat a soldering iron to 200–230°C, depending on the plastic material.

• Place the brass insert on top of the hole and press gently with the soldering iron tip.

• Allow the nut to melt smoothly into the plastic until it is flush with the surface.

• Let it cool and solidify to form a firm, permanent bond.

• Insert an M3 screw to mount your part securely.

Applications:

• 3D printed cases and enclosures

• Electronics and microcontroller housings

• Robotics and mechanical assemblies

• Injection-molded components

• DIY and prototyping projects

• Camera mounts and small devices

• Plastic repair and reinforcement applications

Package Includes:

• 1 x M3 Brass Knurled Heat Insert Nut

M3 brass insert nut, M3 heat set insert, knurled brass nut, M3 heat embed nut, hot melt brass insert, 3D printer insert nut, copper threaded insert, ultrasonic brass insert, heat set threaded insert Bangladesh, M3 knurled copper nut, brass threaded fastener, plastic part insert nut, 3D printing accessories, injection molding insert, heat press brass nut, M3 thread insert for PLA ABS PETG, DIY prototype hardware, precision brass fastener, mechanical thread insert, 3D printer case nut