Hillman Grade 8 Hex Head Cap Screws, 9/16 in. x 3 in., 25-Pack

Heavy-duty Hillman grade 8 hex head cap screws deliver high torque capability and reliable clamping power for structural and automotive applications. Heat-treated steel with a yellow dichromate-style finish enhances strength and wear resistance, while the washer face under the head helps create a better seal.

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Key Features:

• Grade 8 Strength: Heat-treated steel for superior tensile strength in demanding applications
• Hex Head + Machine Threads: Enables high torque tightening with a wrench or driver
• Washer Face Under Head: Helps improve bearing surface and sealing
• Partially Threaded Shank: Adds shear strength where clamping force is needed
• Bulk Value: 25-piece retail pack for project or shop use

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Specifications Table:

Specification	Details
Diameter	9/16 inch
Length	3 inch
Material	Steel
Finish	Heat-treated; yellow dichromate-style wear resistance
Grade	Grade 8 (USS)
Head Type	Hex cap head with washer face under head
Thread Type	Coarse machine threads
Thread Coverage	Partially threaded shank
Number in Package	25 pack
Packaging Type	Boxed
Unit of Measurement	Imperial (size listed in inches)

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Frequently Asked Questions (FAQ):

Q: What size are these bolts?
A: They are 9/16 inch diameter by 3 inch length, coarse thread.

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Q: Are these fully threaded?
A: No. They are grade 8 bolts that are partially threaded along the shank.

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Q: What tools are recommended for installation?
A: Tighten using a wrench or a compatible driver on the hex head.

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Q: What is the material and finish?
A: Heat-treated steel with a yellow dichromate-style finish for added wear resistance.

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Q: How many are included?
A: 25 screws per package.

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Industrial Strength, Refined Finish

These hex cap screws bring a polished, utilitarian edge to any project—quietly powerful, impeccably precise. The yellow dichromate sheen lends a subtle glow, elevating hardware from purely functional to thoughtfully considered detail. Style them with blackened steel brackets or warm woods to balance toughness with texture. A steadfast essential, they anchor spaces—and ideas—with luxury-grade reliability.

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Power your build with grade 8 confidence—add this 25-pack of Hillman hex head cap screws to your cart today.