Ohio Screw Products, Inc. (OSP) combines advanced machining technology with strict material testing to deliver precision parts from both ferrous and non-ferrous metals. As a contract manufacturer, our focus is on accuracy, repeatability, and reliability. Whether you require carbon steels, stainless steels, aluminum, copper, engineered plastics, or specialty alloys, OSP provides parts that meet your specifications with quality and consistency.

OSP Material Testing & Quality Selection Process

At OSP, precision doesn’t start at the machine — it begins with the selection and testing of raw materials. Every component we manufacture undergoes a rigorous quality process to ensure that the material performs exactly as expected in your application.

Our process is built on industry-leading standards and decades of expertise. This ensures that whether you are sourcing parts for aerospace, automotive, medical, or industrial machinery, OSP delivers components that are built to last.

How OSP Ensures Material Quality

Certified sourcing – We only work with trusted, approved mills and suppliers that provide full certification and traceability. This ensures materials meet recognized standards before they even arrive at our facility.

Chemical analysis – Advanced testing verifies alloy composition, eliminating impurities and ensuring material integrity. This step guarantees the consistency needed for high-performance applications.

Mechanical testing – Strength, hardness, and ductility are measured to confirm that metals and plastics perform reliably under load.

Corrosion testing – Stainless steel, aluminum, and other corrosion-resistant materials are tested for durability in harsh conditions.

Traceability – Every batch of material is fully documented, giving customers confidence in origin, certification, and performance.

By combining material science and machining expertise, OSP ensures that every customer receives precision parts built on a foundation of strength, reliability, and certified quality.

Complete List of Materials OSP Machines

We support a wide range of industries by machining materials that balance strength, durability, corrosion resistance, and performance.

Ferrous Materials

• Carbon Steels – 1018, 1045, 1050, 1215, 12L14, 1117, 1141, 1144
• Stainless Steels – 303, 304, 316, 316L, 347, 15-5PH, 17-4PH, 416, 420, A-286
• Alloy Steels – 4140, 4340, 6150, 8620, 52100
• Steel Tubing – DOM, welded seam, seamless
• Gray and Ductile Iron
• Tool Steels – A2, D2, S7
• Powdered Metal

Non-Ferrous Materials

• Copper – 10100, 11000
• Brass – C36000, C27450
• Aluminum – 2024, 6262, 6061, 7075
• Titanium
• Inconel – 625, 718
• Nylon, UHMW, Delrin, PVC

Material Shapes

• Round Bar
• Hex Bar
• Square Bar
• Hot Forgings
• Cold Forgings
• Extrusions
• Castings
• Powder Metal Blanks
• Resin Molded Blanks

This diverse list allows OSP to machine everything from lightweight aerospace components to heavy-duty automotive parts with equal precision.

Materials in Action

Metals

• Steel – Cost-effective and versatile; used in structural, mechanical, and industrial applications.
• Stainless Steel – Corrosion-resistant and durable; ideal for medical devices, food processing equipment, and industrial machinery.
• Carbon and Alloy Steels – Offered in multiple grades; engineered for strength, toughness, and reliability.
• Aluminum – Lightweight yet strong; used in aerospace, automotive, and marine applications.
• Copper – Exceptional electrical and thermal conductivity; critical for wiring, heat exchangers, and precision components.
• Brass and No-Lead Brass – Excellent machinability and conductivity; used in plumbing, electrical, and medical components.
• Bronze – Durable and wear-resistant; ideal for bushings, bearings, and heavy-duty parts.
• Tubing – Essential for structural supports, hydraulic systems, and custom applications.

Engineered Plastics

• Acetal (Delrin®) – High strength, low friction, and excellent dimensional stability; common in gears and bearings.
• PVC – Lightweight and corrosion-resistant; used in housings, fluid systems, and protective components.
• Nylon – Strong, versatile, and wear-resistant; ideal for bushings, pulleys, and industrial parts.

Why Work with OSP?

OSP is more than a machine shop — we are a manufacturing partner trusted across industries. Customers choose OSP because we provide end-to-end machining solutions backed by certified quality.

What sets OSP apart:

• Expertise in ferrous and non-ferrous machining – From tough steels to lightweight aluminum and engineered plastics.

• Rigorous testing and certified material selection – Every part starts with verified, documented materials.

• Custom parts built to exact specifications – Meeting tight tolerances and demanding designs.

• Reliable quality and on-time delivery – Ensuring your supply chain runs smoothly.

Whether you need one-off prototypes or high-volume production runs, OSP delivers parts with accuracy, consistency, and traceable quality.

Get the Right Material for Your Precision Parts

From automotive gears and aerospace components to medical devices and industrial machinery, OSP ensures your project benefits from the right material, expertly machined. By combining certified sourcing, advanced testing, and state-of-the-art machining, OSP provides more than parts — we provide confidence.

Contact OSP today to learn how our expertise in ferrous and non-ferrous metals, engineered plastics, and specialty alloys can support your next project with proven quality and precision.

Full-Service Precision Manufacturing

At Ohio Screw Products, Inc. (OSP), we believe that true precision manufacturing is more than machining parts — it’s about providing a complete solution that takes a customer’s design from concept to finished, ready-to-use product. With more than 75 years of experience, an employee-owned culture, and certifications including ISO and ITAR, OSP has built a reputation as a reliable contract manufacturing partner across industries such as aerospace, automotive, defense, medical, and industrial equipment.

Our capabilities extend well beyond machining. We offer a full suite of in-house processes that allow us to maintain control over quality and consistency, paired with a network of trusted outsource partners that provide specialized treatments and finishes. This integrated approach ensures every part we deliver meets the highest standards of performance, precision, and traceability.

End-to-End Manufacturing Solutions

What makes OSP unique is the ability to combine these capabilities into a complete solution. By integrating machining, finishing, testing, assembly, and packaging, we eliminate the need for multiple vendors and reduce supply chain complexity. This approach offers customers:

• One point of accountability – A single partner from raw material to finished assembly

• Certified quality and traceability – Backed by ISO and ITAR compliance

• Efficiency and reliability – Optimized processes that ensure parts are delivered on time and within spec

In-House Capabilities

The foundation of OSP’s success lies in our advanced machining technologies and support services performed under one roof. These insourced capabilities allow us to maintain complete oversight, minimize lead times, and provide repeatable results for even the most complex projects.

Multi-Axis CNC Turning

Our multi-axis CNC lathes are capable of producing intricate geometries with superior precision. These machines handle tight tolerances and complex features, making them ideal for industries where accuracy is non-negotiable. CNC turning at OSP supports both low- and high-volume production runs, giving customers flexibility without sacrificing consistency.

Milling

High-precision milling machines allow us to create complex shapes, slots, and surfaces. Whether producing flat, angled, or contoured components, our milling operations deliver the accuracy and repeatability required by industries such as aerospace, automotive, and medical device manufacturing.

ID/OD Threading

Threading is an essential requirement in many applications. OSP provides both internal and external threading services, ensuring that every part meets fit, function, and compatibility requirements.

Grinding (ID/OD)

For applications requiring exact surface finishes and close dimensional accuracy, our grinding capabilities deliver results. Both internal and external grinding processes allow us to achieve tolerance levels necessary for high-performance assemblies.

Polishing

OSP provides in-house polishing services to achieve functional finishes, reduce friction, and meet cosmetic standards. This step ensures parts not only perform correctly but also meet the aesthetic requirements of industries such as medical devices and consumer products.

Multi-Spindle Machining

Our multi-spindle machines combine speed with precision, allowing us to efficiently manufacture high-volume parts while maintaining quality. These machines are ideal for components that require quick cycle times without compromising tolerances.

Polygon Turning

Polygon turning enables the creation of non-cylindrical features directly on a lathe, saving time and improving precision. This process supports specialized applications that require multi-faceted shapes or drive features.

Custom Tooling Design & Build

Every part begins with the right tooling. At OSP, we design and build custom tooling in-house, allowing us to optimize each process for efficiency and accuracy. Custom tooling reduces setup time and ensures repeatable performance across production runs.

Precision Washing & Deburring

Clean parts are critical for performance in industries such as aerospace and medical. OSP offers precision washing and both manual and automated deburring to remove contamination, sharp edges, and burrs. This ensures that every component leaving our facility is production-ready.

Part Marking

Traceability and compliance are critical. Our in-house part-marking capabilities allow us to provide permanent identification, meeting customer and industry standards for serialized and coded components.

Resistance Welding & Assembly

OSP supports customers who need assemblies rather than individual parts. Resistance welding, combined with sub-assembly and full assembly services, allows us to deliver turnkey solutions that reduce supply chain complexity.

Kitting & Packaging

Our manufacturing support services extend to kitting and packaging, ensuring that parts are delivered in customer-specific configurations that streamline final integration.

Outsourced Capabilities

In addition to our robust in-house services, OSP partners with trusted, certified vendors to provide specialized treatments and finishes. These outsource processes are carefully monitored and fully traceable, ensuring that every part meets industry and customer specifications.

Heat Treating

Heat treating enhances the strength, durability, and wear resistance of metals. OSP coordinates a wide range of processes, including:

• Vacuum heat treating

• Annealing

• Carburizing

• Carbonitriding

• Induction hardening

• Precipitation hardening

• Normalizing

• Stress relieving

Each treatment is selected to match the performance needs of the final part, whether that means added toughness, improved fatigue resistance, or dimensional stability.

Plating & Coating

To extend product life and improve functionality, OSP offers multiple plating and coating options. These include:

• Zinc

• Chromate conversion

• Anodize

• Masking

• Gold

• Silver

• Nickel

• Tin

• Chrome

• Black oxide

These finishes enhance corrosion resistance, electrical conductivity, and surface hardness, while also meeting cosmetic and industry-specific requirements.

Cleaning & Nondestructive Testing (NDT)

In industries such as aerospace and medical, validated cleanliness and structural integrity are non-negotiable. OSP manages outsourced cleaning and NDT services including:

• Passivation

• Fluorescent penetrant inspection

• Magnetic particle inspection

• Eddy current testing

• Ultrasonic testing

• Electropolishing

These methods verify that every component is free from defects and compliant with rigorous industry standards.

Advanced Deburring

For parts with complex geometries or internal passages, traditional deburring may not be sufficient. OSP provides advanced outsourced options such as thermal deburring and electro-chemical deburring, ensuring that even hard-to-reach areas are burr-free.

Partner with OSP

When you choose OSP, you gain a manufacturing partner with the expertise, certifications, and capabilities to support your most demanding projects. From CNC turning and milling to heat treating, plating, and assembly, we provide a complete package that ensures precision, consistency, and reliability at every step.

Contact OSP today to learn how our full-service capabilities can support your next project with proven performance and trusted results.