J A-co Machine Works, LLC
Jaco manufactures custom precision machined parts and assemblies using CNC machining processes including 5-axis precision machining, CNC Swiss screw machining, vertical CNC milling, and horizontal CNC machining, along with secondary services such as laser welding, citric passivation, and 3D printing. The company works with metals including aluminum, stainless steel, copper, brass, nickel alloy, and titanium, as well as plastics including Delrin, acetal, POM, PEEK, and Ultem. It serves the medical device, aerospace, sensor device, surgical instruments, electrical connector, semiconductor, robotic, and biotech life sciences industries, and holds ISO 9001 and AS9100D certifications.
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| J A-co Machine Works, LLC | Scotts Valley | CA | — | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.


