1. Core material characteristics
The raw material is H59 high-grade yellow brass, with uniform and bright metallic color, flexible and easy to process; resistant to oxidation in humid air, weak acid and weak alkali environments, no need for electroplating coating, and no problem of coating peeling and contaminating the plastic; low interference with insulation, suitable for use in electronic and electrical products.
2. Structural and processing characteristics of different styles
Diamond-shaped embossed straight-through pre-installed copper sleeve
The outer wall is fully covered with diamond-shaped anti-slip net patterns, with chamfered ends, and the interior is fully connected with internal threads; during injection molding, the plastic fills the patterns, and the fit is firm, mostly used for pre-installing in plastic casings, appliance casings, toys, and precision plastic parts.
Multi-step hexagonal elongated copper column
Three segments of hexagonal limit steps are integrated as one piece, with flat six sides for easy clamping with a wrench, and a full-length through-thread; it also has the functions of raising, spacing, and connecting, suitable for equipment mainboards, chassis, mold heightening assembly.
Straight toothed embossed short inserts at both ends
Both ends have circular straight tooth embossing, with a smooth cylindrical middle, small and short specifications, suitable for micro precision plastic parts, electronic connectors, and small instrument casings pre-installed, with a small volume and no occupation of internal space.
Gated hexagonal closed / straight-through nuts
The middle hexagonal limit step, one end is closed, and the other end has internal threads, can be used for external locking and limiting, or short-distance injection molding pre-installation, suitable for small plastic covers, knob casings for tightening.
3. General physical processing characteristics
The threads are metric standard threads, with strong interchangeability, suitable for regular standard screws;
All ports have internal and external chamfers and deburring, no damage to the mold during injection molding, no damage to the workpiece during assembly;
The surface is polished with original brass, without oil stains, burrs, and does not contaminate plastic raw materials;
Supports custom non-standard sizes, special limit steps, through holes / blind holes, and special thread specifications as needed.

H59 brass substrate, with excellent comprehensive performance
Selected from national standard H59 brass raw materials, it has strong toughness and is not prone to cracking. It inherently possesses natural anti-rust and anti-oxidation properties, and will not rust or corrode over a long period of use. The conductive and heat-conductive performance is stable, without magnetism, and will not cause electromagnetic interference. Compared to iron-based embedded nuts, it does not have the risk of rusting and cracking of plastic parts during assembly.
Anti-slip embossed design, easy to be injected and not likely to fall off
The embossed model has a precise rhombic network pattern / straight tooth embossed texture on the outer wall. After injection molding, the plastic completely fits into the texture gaps, forming a strong locking structure that will not loosen or rotate when subjected to tension or torsion, solving the problem of ordinary smooth copper sleeves coming off and slipping.
CNC precision turning, with uniform and smooth thread dimensions
The entire product is formed by a CNC precision lathe, and is fully inspected with internal and external thread stop gauges. The thread patterns are uniform and smooth, and the screws can be screwed in without any jamming or tooth slippage. The outer diameter, length, and step tolerances are strictly controlled, ensuring high consistency in batch product dimensions. The mold injection and assembly do not require secondary adjustment.
Multiple style structures, suitable for different assembly requirements
Hexagonal model is suitable for wrench clamping assembly and can be used for external heightening, interval connection; Embossed model is specifically designed for plastic injection embedding; It covers various lengths and specifications for small precision enclosures and large plastic shells, providing a one-stop solution for different working conditions and copper inserts, reducing the cost of purchasing from multiple suppliers.
Integrated molding without splicing, with high structural strength
The overall turning processing has no welding or splicing weak points. It is resistant to impact and torsion, and will not deform or crack in the injection molding high-temperature environment. The surface is smooth without burrs, the edges and corners have precise chamfering, and it will not scratch the plastic mold cavity during embedding.
Stable long-term use, without damaging the plastic shell
The brass has a higher thermal expansion coefficient and better matching with plastics. It will not be squeezed and cracked by thermal expansion and contraction due to high and low temperatures, compared to stainless steel embedded sleeves. It is friendly to thin-walled plastic parts, effectively reducing the product scrap rate.

1. Injection molding for electronic plastic casings
Charging device casings, remote control housings, smart home panels, instrument and meter plastic casings, Bluetooth earphone plastic parts, with raised thread pre-injection structure that firmly locks the plastic and prevents screws from slipping and coming off during disassembly.
2. Plastic products for household appliances and bathrooms
Plastic shells for water purifiers, body shells for small appliances, plastic accessories for bathrooms, plastic handles for kitchenware, brass for rust prevention, long-lasting use in humid environments without rusting, avoiding rust stains that contaminate the products.
3. Automation equipment and chassis assembly
Industrial control chassis, elevated circuit board isolation, mold tooling interval connection, hexagonal elongated copper columns for motherboards, elevated module pads, facilitating circuit wiring, convenient for disassembly and assembly.
4. Toys, stationery, and daily plastic products
Children's plastic toys, storage boxes, plastic casings for stationery, DIY handmade plastic parts, with pre-injected copper sleeves to enhance product tightness and durability, and prevent the shell from being damaged even after repeated disassembly.
5. Precision medical small equipment
Medical plastic instrument casings, disposable testing accessories, brass without harmful substances leaching, heat-resistant injection molding for disinfection, precise dimensions without affecting equipment accuracy.
6. Small components for new energy
Plastic casings for lithium batteries, small plastic accessories for charging stations, brass with stable conductivity and no magnetism, will not interfere with circuit signals, suitable for new energy electronic components.