Hillman 5/8 in. D x 4-1/2 in. L Heat Treated Steel Hex Head Cap Screw, Grade 8, 25-Pack

Hillman 5/8 in. D x 4-1/2 in. L Heat Treated Steel Hex Head Cap Screw, Grade 8, 25-Pack

Regular price $96.99

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Hillman Grade 8 Hex Head Cap Screws, 5/8" x 4-1/2", 25-Pack

Heavy-duty Hillman hex head cap screws deliver Grade 8 strength for demanding fastening jobs. Made from heat-treated steel with a washer face under the head, they provide a reliable clamp and wear resistance in structural and machinery applications.


Key Features:

  • Grade 8 Strength: Heat-treated steel for high tensile performance and durability
  • Washer Face Head: Built-in bearing surface for improved seal and load distribution
  • Partially Threaded Shank: Optimizes clamping force and alignment in assemblies
  • Coarse Thread: Facilitates quick installation and strong hold in tapped holes or with nuts
  • 25-Pack Value: Convenient boxed quantity for jobsite or shop replenishment

Specifications Table:

Specification Details
Diameter 5/8 inch
Length 4-1/2 inch
Material Heat-treated steel
Grade Grade 8 (USS)
Head Style Hex head with washer face
Thread Type Coarse
Threading Partially threaded shank
Finish/Color Heat-treated; yellow dichromate wear-resistant finish (per web data)
Number in Package 25 (boxed)
Unit of Measurement Imperial (size listed in inches)

Frequently Asked Questions (FAQ):

Q: What size are these bolts?
A: Each hex head cap screw is 5/8 inch diameter by 4-1/2 inch length.


Q: Are these fully threaded?
A: No. They are partially threaded along the shank for improved clamping performance.


Q: What material and grade are they?
A: They are Grade 8, heat-treated steel for maximum strength in heavy-duty applications.


Q: What thread type do they use?
A: Coarse thread, suitable for use with matching coarse-thread nuts or tapped holes.


Q: How many come in the box?
A: 25 screws per pack.


Industrial Poise, Engineered Strength

There’s a certain elegance to hardware that marries precision with presence, and these Grade 8 hex cap screws do just that. The heat-treated steel and clean hex silhouette bring a confident, utilitarian polish to any exposed fastener moment. Style them with blackened steel brackets or natural oak joinery to make the hardware a subtle statement. Consider them the quiet luxury of serious construction—strength that looks refined.


Equip your project with Grade 8 reliability—add these Hillman 5/8 in. x 4-1/2 in. hex cap screws to your cart today.

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