Threaded Fasteners
Production of screws, bolts, studs, inserts, and threaded standoffs with unified, metric, acme, and custom thread profiles for repeatable, high-accuracy results.
Get precision CNC turning for threaded parts backed by decades of screw machining experience, tight-tolerance production, and in-house finishing. M.A.R.'s Engineering supports prototypes through high-volume runs with consistent thread quality, traceability, and streamlined manufacturing from one experienced California facility.
Precision turning solutions for threaded components, from prototypes to high-volume production with integrated finishing and quality control.
Production of screws, bolts, studs, inserts, and threaded standoffs with unified, metric, acme, and custom thread profiles for repeatable, high-accuracy results.
Swiss-type CNC turning supports small, complex threaded parts with exceptional stability, tight tolerances, and multiple operations completed in a single setup.
Machining of threaded fittings, adapters, and connectors with internal and external threads, grooves, and secondary features maintained in precise relationship.
Ideal for short to medium runs of custom threaded parts, combining close tolerances, flexible setups, and efficient multi-operation production.
High-volume threaded part manufacturing with multiple simultaneous operations for lower per-part costs, faster cycle times, and consistent output.
In-house plating, polishing, deburring, and light assembly help deliver threaded parts ready for corrosion resistance, appearance, and end-use performance.
M.A.R.'s Engineering delivers CNC turning for threaded parts with the flexibility to support prototypes, repeat orders, and high-volume production. With in-house screw machining, Swiss turning, plating, and quality control under one roof in San Leandro, customers gain consistent thread accuracy, reduced lead times, and fewer handoffs across the manufacturing process.
See how precision machining expertise supports reliable threaded part production across demanding industrial applications.
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
Customers rely on M.A.R.'s Engineering for precision, continuity, and efficient end-to-end manufacturing support.
Family-owned since 1964, with decades of proven threaded part and screw machining expertise.
Turning, EDM, finishing, and assembly in one San Leandro facility reduce delays and vendor handoffs.
Single- and multi-spindle equipment supports prototypes, repeat jobs, and efficient 500+ piece production runs.
ISO-compliant processes and traceability help maintain consistent thread accuracy for demanding California and national industries.
Built on family ownership and machining discipline.
M.A.R.'s Engineering Company Inc. has been family-run since 1964, when Manuel and Reine Ambrosio founded the business to specialize in precision screw machining of complex parts. Over the decades, the company expanded its capabilities through multi-spindle equipment, a dedicated CNC department, and in-house Wire EDM to improve quality control and responsiveness. Operating from San Leandro in the East Bay, M.A.R.'s Engineering serves customers who need dependable threaded components, close tolerances, and streamlined production support. The company's vision remains rooted in practical manufacturing value: combine experienced craftsmanship, modern equipment, and integrated in-house processes to reduce lead times, control quality, and deliver precision parts customers can confidently put into service.
M.A.R.'s Engineering manufactures a wide range of threaded parts, including screws, bolts, studs, inserts, threaded standoffs, fittings, adapters, and custom-profile components. The shop supports unified, metric, acme, and custom thread forms, with production methods selected based on geometry, tolerance requirements, material, and order volume.
Talk with our machining team about specs, volumes, and lead times.
Structured quality controls and traceability.
Supports disciplined inspection practices.
Long-standing manufacturing reliability.
Share your drawing, material, thread specifications, and production volume to get a fast response from our machining team.
For immediate assistance, feel free to give us a direct call at +1 510-483-0541. You can also send us a quick email at info@marseng.com.
For immediate assistance, feel free to give us a direct call at +1 510-483-0541. You can also send us a quick email at info@marseng.com.