Miniature Components
Manufacturing for small-diameter, high-complexity parts using Swiss machining and EDM, ideal for micro-pins, spacers, contact extensions, and other ultra-tight tolerance components.
From prototype runs to high-volume production, M.A.R.'s Engineering delivers precision custom components with tight tolerances, full traceability, and integrated in-house processes. Backed by decades of machining experience, the team helps manufacturers reduce lead times, simplify sourcing, and maintain consistent quality across miniature parts, threaded components, fittings, and other critical machined products.

Complete in-house machining and production services for complex custom components across prototype and high-volume manufacturing needs.
Manufacturing for small-diameter, high-complexity parts using Swiss machining and EDM, ideal for micro-pins, spacers, contact extensions, and other ultra-tight tolerance components.
High-volume production of screws, bolts, studs, inserts, and threaded standoffs with consistent thread accuracy, repeatability, and in-house plating options.
Precision hydraulic fittings, adapters, hose barbs, and custom connectors produced with tight tolerances, strong sealing performance, and complex multi-feature geometry.
Close-tolerance bushings and sleeves manufactured with CNC turning and centerless grinding for precise fit, smooth finishes, and dependable wear performance.
Custom shafts and pins produced to exact dimensional standards with optional grinding, threading, grooves, cross-holes, and finishing for demanding assemblies.
Precision flanges and couplings machined for structural, hydraulic, and mechanical applications with accurate bore, face, and bolt-circle relationships.
M.A.R.'s Engineering provides precision custom components manufacturing for customers who need accuracy, repeatability, and fewer production handoffs. With Swiss machining, CNC turning, screw machining, EDM, grinding, finishing, and light assembly under one roof, the company supports everything from prototypes to large-volume runs. That integrated approach helps shorten lead times, control quality, and deliver ready-to-install parts with dependable dimensional consistency.

See how precision, consistency, and integrated production support demanding component manufacturing requirements.
Customers rely on M.A.R.'s Engineering for precision manufacturing that combines experience, capability, and dependable quality control.
Family-owned since 1964, with decades of expertise in close-tolerance component manufacturing.
In-house machining, finishing, and light assembly reduce delays, handoffs, and outside vendor coordination.
Capabilities include tolerances up to 0.0001 inches for critical parts and fine surface finishes.
ISO-compliant quality systems support consistent output, inspection control, and full dimensional traceability.
Built on decades of machining experience.
M.A.R.'s Engineering Company Inc. was founded in 1964 by Manuel and Reine Ambrosio and has remained a family-run business ever since. Over the years, the company expanded its capabilities through new equipment, a second operations department, multi-spindle capacity, and newer CNC technology. Leadership continuity has remained a defining strength, with Manny Blaine Ambrosio growing up in the business, managing operations by 1990, and purchasing the company in 1996. Today, M.A.R.'s Engineering continues to focus on precision screw machining and complete manufacturing services that help customers move from prototype to production with fewer vendors, tighter quality control, and dependable turnaround.
Precision components are parts manufactured to very tight dimensional tolerances so they fit, move, seal, or perform exactly as intended in an assembly. These parts often require controlled surface finishes, repeatable geometry, and consistent material properties. Common examples include pins, bushings, fittings, threaded parts, shafts, and miniature machined components used in aerospace, medical, electronics, and industrial equipment.
Talk with our team about tolerances, materials, and production options.
Quality-focused manufacturing systems and documented process control.
Compliance supports disciplined inspection and quality practices.
Long-standing manufacturing experience customers can trust.
Share your part requirements, quantities, materials, or drawings, and our team will help you evaluate the right manufacturing approach.
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.