Hillman 9/16 in. Diameter x 1-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-Pack
SKU: 51761093545

Hillman 9/16 in. Diameter x 1-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-Pack

Sale price$46.79 Regular price$51.99
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Hillman 9/16 in. Diameter x 1-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-PackHillman Grade 8 Hex Head Cap Screws, 9 16 in. x 1 1 2 in., 25 Pack Heavy duty hex head cap screws crafted from heat treated Grade 8 steel for high strength fastening. Ideal for machinery, automotive, and structural applications requiring high torque and wear resistance. Key Features: Grade 8 Strength: Heat treated steel construction delivers superior tensile strength for demanding applications Reliable Seal: Washer face under head improves load

Hillman Grade 8 Hex Head Cap Screws, 9/16 in. x 1-1/2 in., 25-Pack

Heavy-duty hex head cap screws crafted from heat-treated Grade 8 steel for high-strength fastening. Ideal for machinery, automotive, and structural applications requiring high torque and wear resistance.


Key Features:

  • Grade 8 Strength: Heat-treated steel construction delivers superior tensile strength for demanding applications
  • Reliable Seal: Washer face under head improves load distribution and seating
  • High Torque Capability: Hex cap head with machine threads supports secure, wrench-driven tightening
  • Corrosion-Resistant Finish: Yellow dichromate treatment enhances wear and corrosion resistance
  • Bulk Value: 25 screws per box for jobsite or shop efficiency

Specifications Table:

Specification Details
Diameter 9/16 inch
Length 1-1/2 inch
Material Steel
Grade Grade 8 (USS)
Finish Heat-treated, yellow dichromate
Head Style Hex cap head with washer face
Thread Type Coarse machine thread
Thread Coverage Partially threaded shank
Pieces per Package 25
Packaging Type Boxed
Intended Use Use with a nut or in a tapped hole; tighten with wrench or drill

Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: No. They are partially threaded along the shank, per USS Grade 8 design.


Q: What thread type do they use?
A: Coarse machine threads.


Q: What tools are needed for installation?
A: Tighten using a wrench or a drill/driver with the appropriate hex socket.


Q: What is the finish?
A: Heat-treated, yellow dichromate finish for added strength and wear resistance.


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


Industrial Strength, Clean Precision

These Grade 8 cap screws bring a quiet authority to any build—sleek, purposeful, and beautifully engineered. The hex head and washer face feel sculptural, creating a crisp junction between metal planes. Style them with matte-black hardware and oiled oak for a nuanced, workshop-chic narrative. A small detail with a luxe impact, they anchor your vision with unwavering strength.


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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51761093545

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Reviewed in the United States on February 27, 2026
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