Through-hole Knurled Copper Nuts

Through-hole knurled copper nuts are the counterpart to blind hole inserts, featuring a through-hole design. Like their blind-hole counterparts, they have a knurled exterior for secure grip. Their key advantage is the combination of full through-hole fastening capability, anti-rotation knurled engagement, and the excellent performance of brass. Compliant with GB/T 807 and equivalent international standards, the clear knurl pattern grips the host material to prevent rotation or loosening. The through-hole allows a bolt or screw to pass completely through the insert, enabling two-way connections in applications such as sandwich panels or wherever a stud is needed. Constructed from brass (H62/H65), these inserts provide electrical and thermal conductivity, corrosion resistance, and good ductility. Products are high-quality brass components for versatile press-in or molded-in applications.

Through-hole knurled copper nuts are widely used in plastic mold components, electronic devices, instruments, automotive electronics, and communication equipment - fields requiring through-hole installation. In plastic mold components, they are embedded into sliders to create robust, aligned connection points. In electronic devices, they provide secure through-hole fastening for circuit boards within plastic housings, with copper ensuring reliable electrical conductivity. In instruments and automotive electronics, they enable stable internal fastening that tolerates temperature changes. Product offer dependable performance in demanding press-in applications.

These inserts are manufactured from high-quality H62/H65 brass, conforming to GB/T 5231 standards. The material typically has a Brinell hardness of HB 85–105 and tensile strength ≥300 MPa, ensuring excellent machinability and installation stability. The standard surface treatment is natural passivation, though nickel plating (ASTM B733) is also available for enhanced corrosion resistance, achieving over 72 hours of salt spray protection. Through-hole knurled copper nuts are ISO 9001 certified, with through-hole diameter tolerances held within ±0.015 mm and precise knurl dimensions to ensure consistent installation in batch production. Customization is available for fine-pitch threads, special knurl patterns, alternative copper alloys, and specialized surface treatments. Supplied in bulk packs of 300–500 pieces with installation size reference charts, they facilitate fast selection and precise use for your projects.