Precision Parts. Trusted Service.
We excel in manufacturing high-precision, high-production custom CNC screw machine parts and products to meet ISO 9001:2015 standards. We machine a wide assortment of materials serving a variety of industries from our plant located in St. Peters, Missouri.
Founded in 1968, H & M Machine Service is a family-owned manufacturer delivering high-quality precision parts with innovative, efficient solutions at a fair price. Founded on craftsmanship, reliability, and customer commitment, we continue to provide the same dependable service and quality our customers have trusted for generations.
Certified Excellence
H & M Machine Service is ISO 9001:2015 certified, ensuring every product meets the highest standards of quality and consistency. From the first cut to the final inspection, our team is dedicated to precision at every step.
Industries We Serve
We are proud to partner with customers across a wide range of industries—each with unique challenges and exacting requirements. Our versatility allows us to provide tailored machining solutions that perform under pressure and deliver long-term value.
We currently serve:
- Agriculture
- Automation
- Automotive
- Building Materials
- Compressed Air
- Fire Suppression
- Industrial Heating
- Marine
- Material Handling
- Medical
- Packaging
- Printing
Precision at Its Finest
At H&M Machine Service, precision isn’t just a promise—it’s our specialty. Our advanced equipment includes a state-of-the-art Citizen® Swiss CNC machine, known for producing small, complex parts with exceptional accuracy and efficiency. Swiss machining technology allows us to deliver tight tolerances, smooth finishes, and reliable repeatability for both high-volume production and intricate custom components.
Whether you need a single prototype or millions of parts, our skilled team and cutting-edge technology ensure you receive superior quality, faster turnaround times, and unmatched service.
See It in Action
Watch our Swiss Machine at work and experience the precision that sets H & M Machine Service apart. Contact us today to learn how we can bring your next project to life.