Carbon Steel Fasteners
Carbon steel fasteners are one of the most cost-effective, high-strength solutions available for industrial applications. At Abbott Interfast, we manufacture precision carbon steel machined parts and fasteners to meet strict mechanical and dimensional requirements. With decades of experience and full ISO 9001:2015 certification, we’re your trusted supplier for custom screws, bolts, and components made from Grades 2, 5, 8, and more.
*Available in inch and metric sizes.
The Functionality Behind Carbon Steel Fasteners
Manufacturers and engineers alike turn to carbon steel fasteners daily because of their durability and versatility across countless industrial applications. These fasteners provide reliable performance under pressure, with tensile strengths ranging from 50 KSI to 300 KSI, depending on the grade.
From general-purpose screws to high-strength bolts, carbon steel offers a dependable solution for both structural and precision fastening needs. It remains one of the most trusted materials for manufacturing durable, cost-effective fasteners.
Material properties for these grades include:
Understanding the strength, machinability, and durability of different carbon steel fasteners is essential when selecting the right material for your application. Abbott Interfast offers fasteners made from a full range of carbon steel grades, including Grades 2, 5, and 8, as well as specialty alloy steels.
Grade 2:
Grade 2 carbon steel fasteners are made from low-carbon steel and are ideal for non-critical or general-purpose applications. They offer excellent workability and affordability, making them one of the most common options for bolts, screws, and other basic hardware.
While they provide lower tensile strength than higher grades, they are easy to machine and form.
Grade 5:
On the other hand, Grade 5 fasteners are made from medium-carbon steel and are often heat-treated or work-hardened to increase their strength and wear resistance. These carbon steel machined parts strike a solid balance between durability and cost, making them ideal for use in automotive, construction, and industrial applications.
Grade 5 fasteners typically fall within a Rockwell hardness range of C19 to C30.
Grade 8:
Additionally, Grade 8 carbon steel fasteners come from medium-carbon alloy steel and are significantly stronger than Grade 5. They’re hardened to achieve high tensile strength, with a Rockwell hardness between C33 and C39.
Typically, you’ll find these heavy-duty fasteners in high-load applications where maximum performance is expected every time.
Alloy steel:
Alloy steel is steel that has small amounts of one or more alloying elements (other than carbon) such as manganese, silicon, nickel, titanium, copper, chromium or aluminum added. Alloy steel is used mostly for socket products. Brinell hardness is a range depending on the alloying elements mixed in.
Metric Carbon Steel Fasteners
Finally, metric-grade carbon steel fasteners follow a different classification system, commonly found in global manufacturing. Classes 4.6 and 4.8 are low to medium-carbon steel, offering similar properties to those of Grade 2.
Class 8.8 is comparable to Grade 5 and is heat-treated for improved strength, while Class 12.9 exceeds the strength of Grade 8 and is made from quenched and tempered alloy steel for extreme load-bearing needs.
Types of Carbon Steel Fasteners:
Abbott Interfast manufactures and supplies a comprehensive range of carbon steel fasteners to meet the demanding requirements of industrial and structural applications. We offer our components in both inch and metric sizes, and you can customize them for strength, thread type, head style, and finish.
Common carbon steel fastener types include:
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Carriage bolts
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Anchor bolts
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Flange bolts
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Hanger bolts
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Eye bolts
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Structural bolts
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T-head bolts
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Sheet metal screws
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TEK screws
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Wood screws
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U-bolts
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Hex nuts
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Square nuts
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Wing nuts
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Washers and lock washers
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Retaining rings
We frequently work with industry-standard carbon steels such as 1018, 1215, 12L14, and 1137 to produce parts that are durable, machinable, and cost-effective. Regardless of your specifications, we can deliver the right fastener solution.
Why Choose Abbott Interfast for Carbon Steel Machined Parts
Abbott Interfast has been manufacturing carbon steel machined parts and fasteners since 1948, with decades of proven reliability across industries. Our team specializes in tight-tolerance machining, secondary operations, and value-added services like kitting, plating, and custom packaging.
We offer both domestic and global sourcing to meet budget and delivery needs of all scales. With our numerous certifications and years of experience, you can trust us to deliver carbon steel fasteners that meet the specs and standards you deserve.
Get Your Carbon Steel Fasteners to Spec With Abbott Interfast
Get high-performance carbon steel fasteners manufactured to your exact needs with Abbott Interfast. Our team routinely delivers precision, speed, and quality, order after order.
When you need top-quality carbon steel machined parts and you need them fast, our team has your back.
Carbon Steel Fastener FAQs
What finishes do you have available for carbon steel fasteners?
Carbon steel fasteners can be finished with coatings like zinc, black oxide, phosphate, powder coating, or galvanizing to improve corrosion resistance and appearance.
Are carbon steel machined parts suitable for high-temperature applications?
Certain grades of carbon steel, especially alloyed variations, can withstand elevated temperatures, making them suitable for use in engines, industrial machinery, and heat-exposed assemblies.
Can you utilize carbon steel fasteners in outdoor or marine environments?
While raw carbon steel can corrode in harsh environments, Abbott Interfast can apply protective finishes or suggest alternative materials for improved performance in outdoor or marine applications.
Do you provide custom prototypes for carbon steel machined components?
Yes! We offer prototyping services for carbon steel machined parts to support early testing, design validation, and low-volume production.
