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Flat Socket Cap Screws

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A flat socket cap screw features a countersunk flat head that will install flush with the base material. Installed with Allen wrenches or hex key wrenches, these fasteners are often utilized for the clean, flush look they provide in areas with moving parts that can’t risk catching. They are also an excellent choice in applications where space is limited, as the hex key installation is quickly achieved.

Fasteners Etc. Inc. offers flathead socket screws in a variety of materials and finishes for both standard and metric screws. As a leading supplier of fasteners in Illinois, we are your best source of socket products for your projects. Shop below to find the flat socket cap screws you need today. Contact us with any questions or for more information.

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Flat Socket Cap Screw

Benefits of Different Materials for Flat Socket Cap Screws

Stainless Steel

Stainless steel flat socket cap screws offer excellent strength, durability, and corrosion resistance, making them ideal for marine, food, and medical applications as well as use in harsh environments. The stainless steel appearance provides a clean, polished finish for aesthetic applications. We offer flat socket cap screws in 18-8 SS for general-purpose applications and 316 SS for more intense projects.

Thermal Black Oxide

Thermal black oxide-coated screws increase wear resistance and decrease friction to improve performance in mechanical applications. The oxide coating improves lubricity, increases hardness, and provides a sleek, low-glare finish while maintaining easy assembly and disassembly. These screws are often used for aerospace projects, automotive interiors, or applications requiring a professional, non-reflective finish.

Zinc

Zinc flat socket cap screws provide a layer of corrosion resistance for indoor and light-duty outdoor use. The zinc plating helps prevent rust while maintaining a smooth surface for easy installation. As cost-efficient fasteners, these screws are widely used in general construction, automotive, and industrial applications.

Flat Socket Cap Screw Sizes and Threads

Sizes for Flat Socket Cap Screws

We offer flathead socket cap screws in both standard (inch) and metric sizes to ensure compatibility with any application. No matter your industry or project needs, you can find the right flat socket cap screw sizes at our Illinois locations.

Thread Options for Flat Socket Cap Screws

Most standard threaded screws and bolts follow ANSI thread standards for coarse (UNC), fine (UNF), and occasionally extra fine threads. We offer metric threaded screws and bolts that meet ISO and/or DIN standards, which are interchangeable for threading measurements. Standard oversight organizations ensure manufacturers maintain consistent tolerances, ensuring uniformity across countries.
At Fasteners Etc., Inc., we supply flat socket cap screws in:

Unified National Coarse (UNC)
Unified National Fine (UNF)
Metric DIN & ISO Coarse Thread
Metric DIN & ISO Fine Thread

Coarse thread parts have wider spacing between threads compared to fine thread parts. They are ideal for general-purpose applications, providing increased holding power and easy assemblies. Coarse thread flat socket cap screws are suitable for use in softer materials, as they are less prone to stripping.
Fine thread screws are ideal for use in hard materials requiring precision connections. The same principle applies to metric bolts, where ISO and DIN standards can be used interchangeably for pitch and thread.

Flat Socket Cap Screw Sizes from Fasteners Etc., Inc.

We offer flat socket cap screws in a range of standard dimensions from ¼” to 1 ½”, ensuring compatibility with a variety of machinery and assemblies. These sizes are widely used in construction, automotive, and industrial applications, providing a secure and precise fit.
We also offer metric sizes from M2 to M30, available in a variety of lengths to meet your exact measurements and needs. Our various flat socket cap screw sizes are available to help you find the best fasteners for your needs.

Technical Details and Advantages of Flat Socket Cap Screws

Tensile Strength

Flat socket cap screws are designed to withstand high tensile loads, making them ideal for applications requiring strong and secure fastening. Their high-strength construction ensures durability under stress, reducing the risk of failure in critical assemblies.

Shear Strength

With excellent shear strength, these screws can resist forces that attempt to slide materials apart. This makes them reliable in structural and mechanical applications where maintaining joint integrity is essential.

Corrosion Resistance

Available from Fasteners Etc., Inc. in materials like stainless steel and other coated finishes, flat socket cap screws provide varying levels of corrosion resistance. This protection extends their lifespan in harsh environments, preventing rust and degradation in demanding conditions.

Choose Fasteners Etc., Inc. as Your #1 Illinois Fastener Supplier

As a veteran-owned business, we are committed to excellence in every order. We offer fast shipping and quick turnaround times for in-stock items to ensure you get the parts you need when you need them. Our excellent customer service sets us apart, providing expert advice and business solutions to help you find the fasteners you need for any application.

Contact Us Today

With locations in Urbana, IL and Bloomington, IL, we are ideally located to serve Illinois and the surrounding areas. Contact us to learn more or request a quote to begin your order of flat socket cap screws today.

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