Hex Cap Screws

South Coast Fasteners, Inc., is your top destination for hex cap screws and fastening solutions you need at a moment's notice. Hex cap screws are threaded fasteners distinguished by their hexagonal heads, allowing for easy tightening or loosening using a wrench or socket. As a leading distributor in the fastener industry, we are dedicated to meeting the needs of our customers across various industries. Whether you’re bolting up a truck chassis, anchoring structural steel, or keeping a machine frame locked tight, our hex cap screws deliver the strength the job demands. From general-purpose builds to high-torque, high-load industrial applications, we carry a full range of grades, finishes, and materials to fit the right task at hand. You’ll find everything from carbon steel to stainless, brass to silicon bronze, with each fastener manufactured for any industry use. Compliant with the ASME B18.2.1-1996 standard, our hex cap screws meet standards set out to ensure uniformity and compatibility. These standards include various dimensions, including thread pitch, diameter, and length, among others, guaranteeing reliability in every application.

At South Coast Fasteners, we offer a diverse range of hex cap screws, ensuring that you find the perfect solution for your project requirements. Browse our hex cap screw offerings or online store to find the right fit for your job. We’re more than just a supplier, we’ll help you choose the right fastener with confidence. Scroll down past the product offerings for a breakdown on materials, grades, and real-world applications to make sure you’re covered on the job from start to finish.

Where Hex Cap Screws Get to Work

Hex cap screws are everywhere and for a very good reason. In automotive, they hold suspension, steering, and engine components under heat, pressure, and vibration. In construction, they anchor steel to concrete, fasten framing members, and join heavy hardware. Manufacturing plants, equipment repair shops, and assembly lines use them to piece together everything from industrial machines to robotics.

With a hex head designed for high-torque tools and easy access, they install quickly and lock down tight. Whether you're tightening with a wrench on a job site or torquing bolts on a lift, you want a fastener that’s as strong as the components it's holding. That’s why hex cap screws are the standard in builds where failure isn’t an option.

Tough Builds Require the Right Materials & Grades

At South Coast Fasteners, we understand no two jobs are the same. Some builds need brute strength while others need corrosion resistance that lasts through every season, salt, or chemicals. And sometimes, you might need both. That’s why we offer a full range of hex cap screw materials and grades, so you can match your hardware to the environment and the loads it will face. Whether you’re bolting into steel, securing moving machinery, or locking down components exposed to the environment, we’ve got the right fastener for the job!

Steel Options

Grade 2 Hex Cap Screws: Made from low or medium carbon steel and not heat-treated, Grade 2 screws are utilized for general-purpose fastening where high tensile strength isn’t necessary. Mostly used in machinery, equipment builds, and structural assemblies that don’t demand heavy load-bearing performance.

Grade 5 & 8.8 Hex Cap Screws: Grade 5 (U.S.) and 8.8 (metric) hex cap screws offer greater tensile strength than Grade 2. These are heat-treated medium carbon steel fasteners used in automotive work, construction, industrial machinery, or anywhere that calls for higher strength under stress.

Grade 8 & 10.9 Hex Cap Screws: For demanding, high-load applications, Grade 8 (U.S.) and 10.9 (metric) screws are the standard. These are heat-treated medium carbon alloy steel screws designed to handle maximum tensile strength and vibrations. It's perfect for structural work, heavy machinery, and equipment that endures constant torque and impact.

Stainless Steel

Stainless Hex Cap Screws: Stainless steel hex cap screws are the go-to choice when corrosion is of concern. They’re commonly used in marine, offshore equipment, chemical processing, food processing, and outdoor applications. We carry stainless steel grades to suit a variety of conditions and environments:

18-8 (Type 304)- General corrosion resistance. Used in food-grade, commercial, and light marine installs.
316 Stainless- Excellent corrosion protection in saltwater, chemical exposure, and high-moisture environments.

Non-Ferrous Options

Silicon Bronze Hex Cap Screws: These screws offer stellar corrosion resistance, especially in marine and coastal environments. It's non-magnetic and known for good strength and ductility. Silicon bronze is the solid choice wherever saltwater, humidity, or environmental corrosion is a factor.

Brass Hex Cap Screws: Brass screws provide good corrosion resistance, strong electrical conductivity, and a clean finish. They’re commonly used in plumbing, electrical systems, and decorative installs where a non-magnetic and corrosion-resistant fasteners are needed.

Aluminum Hex Cap Screws: Lightweight and corrosion-resistant, aluminum hex cap screws are utilized in aerospace, automotive, electronics, or any application where weight savings and environmental resistance truly matters.

Applications and Amenities

Hex cap screws are known for locking down heavy components, absorbing vibrations, and holding steady under intense torque. From shop floors to job sites, they’re trusted by mechanics, builders, and fabricators who don’t have time for failure. In construction, they’re used to anchor steel, frame structures, and connect load-bearing joints. In automotive and heavy equipment, they hold engines, suspensions, and drivetrains together under heat and stress. In manufacturing and industrial machinery, they keep parts aligned and systems running around the clock. With easy installation using standard tools and a design built for torque, hex cap screws deliver steady mechanical connections that won’t loosen under pressure. Combine that with a wide selection of materials and finishes and you’ve got a fastener that's adaptable to just about any job or environment.

Why South Coast Fasteners?

At South Coast Fasteners, we know the difference between a hex bolt that holds and one that doesn't. Our inventory is handpicked for top-tier performance and we’ve built a deep online catalog around tradesmen, technicians, builders, and plant managers who expect quality without needing to ask twice. We ship fast, stock deep, and have experts readily available to assist you with any fastening or industrial supply solution.

Let’s Torque It Down. Ready to Get to Work?

Need a package, a bulk order, or a full job lot of hex cap screws that won’t let you down? We’ve got you covered. Browse our full range of hex cap screw grades, sizes, and finishes online or contact us with any questions.