What these M5 brass inserts do

Brass Flanged Expanding Inserts for Plastic - Non Reversed - M5 - 10 Pack are threaded metal inserts made to add durable M5 machine threads to plastic parts. They provide a stronger, more reusable fastening point for assemblies that need to be opened, serviced, or reassembled without quickly wearing out the plastic.

The brass construction combines corrosion resistance with reliable thread engagement, while the flanged design adds a defined seating surface at the top of the hole. For plastic components that need cleaner, longer-lasting screw retention, this insert style is a practical way to move from direct plastic threads to metal threads.

Key features and benefits of flanged brass inserts for plastic

• M5 internal thread: Fits standard M5 machine screws and bolts used in many printed parts, fixtures, and equipment assemblies.
• Brass construction: Brass is widely used for threaded inserts because it offers good machinability, reliable threads, and resistance to corrosion in normal workshop and indoor use.
• Flanged body: The flange helps create a positive stop and a broader contact area at the top of the part.
• Designed for plastic parts: These inserts are intended for use in plastic components where direct threading may wear or loosen over time.
• Useful for repeat fastening: Metal threads make it easier to remove and reinstall screws repeatedly with less damage to the surrounding part.
• 10-pack quantity: A convenient pack size for prototypes, repairs, small production runs, and multi-point assemblies.

Where M5 expanding inserts are commonly used

These brass inserts are well suited to 3D printed enclosures, machine guards, electronics housings, brackets, jigs, and custom maker projects. They are also useful when upgrading a plastic part that needs a more dependable fastening point for maintenance access panels or removable covers.

For product designers, educators, repair users, and small-batch builders, M5 inserts help create cleaner mechanical assemblies with standard metric hardware. They are a practical choice when a plastic part needs a stronger threaded connection without switching to a fully metal component.

Why use threaded inserts in 3D printed plastic parts

3D printed plastics can work well for structural and functional parts, but directly threading into plastic is not always ideal for joints that see repeated use. A brass insert gives the screw a metal thread to engage with, which can improve serviceability and help maintain fastening performance over multiple assembly cycles.

The flanged expanding insert format is especially useful when part access, removable panels, or modular subassemblies are part of the design. That makes these inserts relevant for hobby builds, print farm tooling, prototype hardware, and workshop fixtures that need repeatable assembly.