Mintion M3 x 5.7mm x 4.6mm Threaded Insert Set – 100 pcs

M3 threaded inserts for robust 3D-printed assemblies

The Mintion M3 x 5.7mm x 4.6mm Threaded Insert Set is designed for 3D-printed parts that need strong, repeatable screw joints. With 100 pieces in a single common size, this pack is ideal for projects that rely heavily on M3 fasteners or as a refill for your existing insert kits.

Dimensions tuned for strength and versatility

Each insert features an M3 internal thread, 5.7 mm length and approximately 4.6 mm outer diameter. This geometry provides a good balance between strength and compact size, making it suitable for mounting brackets, structural frames, enclosure panels and other functional parts.

Reliable grip in common 3D-printing plastics

The knurled brass body offers excellent pull-out resistance and torque strength when heat-set into typical 3D-printing materials such as PLA, PETG and ABS. Compared to direct threading into plastic, these inserts greatly reduce the risk of stripped threads, cracked bosses and loosening over time.

100-piece set for heavy M3 use

With 100 inserts included, this set provides ample stock for print farms, prototyping labs or anyone who frequently uses M3 hardware. It is sold as a single-size pack so you can build inventory around the thread size you rely on most.

Compatible with heat-set tools and soldering irons

The inserts are intended for installation using heat-set tools, soldering irons and compatible adapter tips. Once heated, the knurled surface melts into the plastic and locks in place as it cools, creating a durable and serviceable threaded anchor.

Typical use cases

Common applications include assembling printer parts, mounting motors and sensors, joining enclosure panels, attaching hinges and latches, as well as general mechanical assemblies where standard M3 fasteners are used with 3D-printed parts.