Hillman 5/16 in. D x 1-1/4 in. L Heat-Treated Steel Grade 8 Hex Head Cap Screws, Coarse Thread (100-Pack)Hillman Grade 8 Hex Head Cap Screws, 5 16 in. x 1 1 4 in. (100 Pack) Heavy duty Grade 8 hex head cap screws built from heat treated steel for high strength fastening. Coarse thread with washer face under the head provides secure clamping and reliable torque in machinery, automotive, and construction applications. Key Features: Grade 8 Strength: Heat treated steel delivers high tensile strength for demanding applications Washer Face Under Head:

Hillman Grade 8 Hex Head Cap Screws, 5/16 in. x 1-1/4 in. (100-Pack)

Heavy-duty Grade 8 hex head cap screws built from heat-treated steel for high-strength fastening. Coarse thread with washer face under the head provides secure clamping and reliable torque in machinery, automotive, and construction applications.

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Key Features:

• Grade 8 Strength: Heat-treated steel delivers high tensile strength for demanding applications
• Washer Face Under Head: Improves load distribution and sealing for a solid clamp
• Coarse Thread: Promotes quick starts and strong holding in tapped holes or with nuts
• Precise Sizing: 5/16 in. diameter x 1-1/4 in. length, partially threaded shank
• Bulk Value: Box of 100 screws for shop, jobsite, or inventory needs

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Specifications Table:

Specification	Details
Diameter	5/16 inch
Length	1-1/4 inch
Head Type	Hex head, washer face under head
Material	Steel
Grade	Grade 8
Finish	Heat-treated; yellow dichromate noted
Thread Type	Coarse (USS)
Threading	Partially threaded shank
Units per Package	100 pack
Packaging Type	Boxed

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Frequently Asked Questions (FAQ):

Q: Are these fully or partially threaded?
A: They are partially threaded along the shank.

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Q: What thread type do these use?
A: Coarse thread (USS).

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Q: What grade are the screws?
A: Grade 8, heat-treated for high strength.

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Q: What materials are they made from?
A: Steel, heat-treated; yellow dichromate finish noted on the packaging line.

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Q: What tools do I need to install them?
A: Tighten with a wrench or compatible socket; can also be driven with a drill and socket adapter.

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Industrial Strength, Clean Hardware Finish

These hex cap screws bring a quiet, engineered rigor to your projects—sleek, purposeful, and impeccably strong. The faceted head and washer face create a crisp, tailored look against metal or hardwood. Style them with blackened brackets or raw steel accents for a refined utilitarian statement. Consider them the discreet luxury essential that keeps bold design securely in place.

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Secure your builds with Grade 8 confidence—add this 100-pack to your cart and finish the job right.