Hillman 5/8 in. Diameter x 5 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread (25-Pack)

Regular price $109.99

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Hillman Grade 8 Hex Head Cap Screws 5/8 in. x 5 in. (25-Pack)

Heavy-duty hex head cap screws made from heat-treated Grade 8 steel for high-strength fastening. Coarse-thread, partially threaded shank with washer face under the head for secure clamping in structural and automotive applications.


Key Features:

  • Grade 8 Strength: Heat-treated steel provides high tensile strength for demanding loads
  • Coarse Thread: Partially threaded shank offers strong hold and easier starts in tapped holes
  • Washer Face Head: Built-in bearing surface under head improves seal and load distribution
  • Durable Finish: Yellow dichromate treatment enhances wear and corrosion resistance
  • Bulk Pack: 25 screws per box for efficient project and jobsite use

Specifications Table:

Specification Details
Diameter 5/8 inch
Length 5 inch
Material Steel
Finish Heat-treated yellow dichromate
Grade Grade 8
Thread Type Coarse
Thread Coverage Partially threaded shank
Head Type Hex head with washer face
Number in Package 25 pack
Packaging Type Boxed
Unit of Measurement Imperial
Tightening Method Wrench or drill/driver

Frequently Asked Questions (FAQ):

Q: What socket or wrench size do I need?
A: Use a wrench or socket sized for a 5/8 in. hex cap screw head per standard Grade 8 hex bolt dimensions.


Q: Are these fully threaded?
A: No, they are partially threaded along the shank to maximize shear strength.


Q: What thread type do these bolts have?
A: They have coarse threads suitable for general fastening and easier assembly.


Q: Can these be used outdoors?
A: The yellow dichromate finish offers added wear and corrosion resistance, but for long-term outdoor exposure consider additional protection as needed.


Q: How many bolts are included?
A: This boxed pack includes 25 hex head cap screws.


Industrial Strength with a Polished Edge

These Grade 8 hex cap screws bring a confident, architectural presence to utilitarian details. The bold hex head and warm yellow dichromate finish add a refined, engineered accent to exposed joints. Style them in open-shelf brackets or custom metal legs for a precise, gallery-worthy look. It’s the quiet luxury of hardware that performs as beautifully as it appears.


Upgrade your build with Grade 8 strength—add this 25-pack to your cart and fasten with confidence.

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