Stainless Steel Hex Head Cap Screw, 5/16-18 x 3 in (50-Pack)

Durable 18-8 stainless steel hex head cap screws built for high-torque fastening in tapped holes or with a nut. Coarse 5/16-18 threads and a washer face under the head deliver secure, leak-resistant clamping for indoor and outdoor projects.

Key Features:

• Corrosion-Resistant Stainless Steel: 18-8 grade resists rust for outdoor and marine applications
• High-Torque Hex Head: Machine threads and hex cap enable strong, reliable tightening with wrench or drill
• Washer Face Seal: Integrated bearing surface under the head improves load distribution and sealing
• USS Partially Threaded Shank: Provides alignment and shear strength where full thread isn’t needed
• Bulk Value: 50 pieces per retail pack for jobsite or workshop stock

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What thread size are these screws?
A: They are coarse 5/16-18 machine-thread hex head cap screws.

Q: Are they fully threaded?
A: No. They are USS style with a partially threaded shank for added strength and alignment.

Q: Can these be used outdoors?
A: Yes. The 18-8 stainless steel provides excellent corrosion resistance for outdoor and damp environments.

Q: Do they require washers?
A: They feature a washer face under the head for improved sealing, but separate washers can be added if needed for specific applications.

Q: How are they installed?
A: Tighten with a wrench or a drill into a tapped hole or use with a matching 5/16-18 nut.

Sleek Stainless Fasteners with Architectural Poise

These polished hex cap screws bring a refined industrial edge to cabinetry, hardware, and exposed joinery. The crisp hex head and elongated shank create a clean, linear statement while the stainless sheen elevates everyday fixtures. Style them with brushed steel brackets or contrast against matte black frames for a tailored, modern look. A quiet essential, they deliver strength and sophistication in one elegant detail.

Stock your project with this 50-pack of corrosion-resistant hex cap screws for dependable, clean-lined fastening anywhere you need it.