Circular Connector Pins | Cold-Formed Precision | Manufacturer

Electropin manufactures circular connector pins in lead-free brass and stainless steel. Lead-free brass offers excellent electrical conductivity and formability, while stainless steel provides superior mechanical strength and corrosion resistance. Both materials eliminate REACH and RoHS compliance concerns associated with traditional leaded brass used in machined pins.

Cold-forming — specifically Electropin's automatic die rolling process — shapes wire raw material into finished pins without cutting or heating. Unlike machining, no material is removed, so there is zero scrap. Tools don't dull, meaning dimensional consistency is maintained from the very first pin to the millionth, achieving a defect rate of just 1 in 600,000,000.

Yes. All Electropin connector pins are manufactured using lead-free materials, fully satisfying REACH and RoHS regulatory requirements. Unlike traditional machined connector pins that often require leaded brass for machinability, Electropin's cold-forming process works with lead-free alloys — eliminating compliance risk without sacrificing performance or dimensional accuracy.

Electropin offers four retention feature types: Star, Tabs (Spline), Inscribed Square, and Flat. The Star feature is particularly capable — it can achieve up to 50% greater diameter than the source wire material, providing exceptional retention force in press-fit metal and post-insertion plastic applications without additional hardware.

Electropin's circular connector pins support three primary mounting methods: press-fit into metal housings, through-hole PCB mounting for circuit board applications, and post-insertion into molded plastic parts. Custom retention geometries can be engineered to meet specific pull-out force and torque resistance requirements for each mounting type.

When raw materials are available, Electropin can begin manufacturing and deliver a first production batch in as little as two weeks. High-speed automatic die rolling producing up to 5 pins per second also means production volumes can be dramatically scaled up on short notice to accommodate changing demand or project ramp-ups.

Electropin supplies circular connector pins to the automotive, medical device, agricultural equipment, computer and consumer electronics, and circuit board manufacturing industries. Their cold-formed pins are used in applications ranging from automotive wiring harnesses and PCB through-hole connectors to medical device assemblies and farm equipment electrical connections.