Hillman 5/16 in. x 1 in. Grade 8 Hex Head Cap Screws (100-Pack)

Durable, heat-treated steel hex head cap screws for heavy-duty fastening. At 5/16 in. diameter by 1 in. length, these Grade 8 fasteners feature a zinc dichromate finish for added corrosion resistance—ideal for automotive, machinery, and structural applications.

Key Features:

• Heavy-Duty Strength: Grade 8, heat-treated steel for high tensile performance
• Corrosion Resistant: Zinc dichromate finish helps protect in harsh environments
• Precise Fit: 5/16 in.-18 thread x 1 in. length for common assemblies
• Reliable Drive: Hex head design enables high torque tightening with standard wrenches
• Bulk Value: Convenient 100-pack for shop or jobsite stock

Specifications Table:

Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: Yes, this 5/16 in.-18 x 1 in. cap screw is fully threaded as shown.

Q: What tools are needed for installation?
A: Use a standard hex socket or wrench sized for a 5/16 in.-18 hex head cap screw.

Q: What grade are these bolts?
A: They are Grade 8 heat-treated steel for high strength applications.

Q: What is the finish?
A: Zinc dichromate coating for enhanced corrosion resistance.

Q: Is this a coarse or fine thread?
A: Coarse thread (5/16 in.-18).

Industrial Poise with Purpose

These hex head cap screws bring a precise, engineered rhythm to any space—sleek, golden-toned zinc that catches the light with quiet confidence. I love the crisp geometry of the hex head; it feels both refined and unapologetically utilitarian. Style them in view on open shelving or exposed hardware moments to celebrate the mechanics of design. Consider these your understated jewels—small, strong, and essential to luxe, lasting craftsmanship.

Upgrade your hardware kit with these Grade 8 Hillman cap screws for reliable, high-strength fastening on every project.