I help engineers and procurement teams source reliable hardware, and my current pick is the Brass M2 M3 M5 M6 Knurled Nut Threaded Insert Nut. For plastics and soft metals, the knurled grip ensures torque-ready performance, while the brass body resists corrosion in tough environments. These inserts thread cleanly into pre-drilled holes, locking fasteners in place and distributing load across your component. I offer these in multiple M sizes (M2, M3, M5, M6) for design flexibility, and the knurl pattern keeps installation consistent. When you buy in bulk, you can expect a competitive Discount and fast Quotes to keep your production line moving. I can arrange samples, lead times, and certs if needed. If you’re coordinating OEM builds or repair kits, these inserts deliver repeatable results, easy installation, and long service life.
Brass knurled threaded inserts in M2, M3, M5 and M6 provide secure, pull-out resistant threads for plastics and soft metals. The knurled sleeve grips the host material, while the internal threads offer durable, vibration-resistant fastening. Brass offers good machinability and natural corrosion resistance, making these inserts suitable for electronics housings, automotive interiors, and household appliances. Finishes such as nickel or zinc extend wear life in demanding environments. Global buyers value consistent tolerances, traceability, and compliant sourcing. In 2025, demand centers on scalable packaging, RoHS compliance, and reliable lead times. Suppliers who provide lot transparency and flexible packaging help reduce line downtime and simplify multi-site procurement. With standard M2–M6 inserts, manufacturers can streamline sourcing, shorten lead times, and maintain quality across global programs while meeting evolving sustainability and performance standards.
| Size | Material | Finish | Thread | Length (mm) | Knurl Diameter (mm) | Insertion Depth (mm) | Hardness (HB) | RoHS | Hole Diameter (mm) | Application Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| M2 | Brass (C36000) | Nickel-Plated | M2 x 0.4 | 6.0 | 3.0 | 4.0 | 68 | Yes | 1.8 | Light-load plastic housing |
| M3 | Brass (C36000) | Tin-Plated | M3 x 0.5 | 8.0 | 3.6 | 5.5 | 70 | Yes | 2.7 | General-purpose enclosures |
| M5 | Brass (C36000) | Nickel-Plated | M5 x 0.8 | 10.0 | 5.0 | 8.4 | 72 | Yes | 3.9 | High-strength plastics |
| M6 | Brass (C36000) | Tin-Plated | M6 x 1.0 | 12.0 | 5.8 | 9.5 | 75 | Yes | 5.2 | Heavy-duty assemblies |