Hillman 9/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-Pack
SKU: 5501494654

Hillman 9/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-Pack

Sale price$66.59 Regular price$73.99
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Description

Hillman 9/16 in. Diameter x 3 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, 25-PackHillman 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. Key Features: Grade 8 Strength: Heat treated steel for superior tensile strength

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.


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

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)

Frequently Asked Questions (FAQ):

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


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


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


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


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


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.


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

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: 5501494654

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A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Summer wedding kids suit
Color: Navy, Size: 10 Years, Color: Navy, Size: 10 Years
Bought this suit for my son in the 10 youth size and honestly was pleasantly surprised by the quality for the price. The navy color looks sharp and dressy without being too stiff or uncomfortable. The material has a little stretch, which helped it fit nicely and made it comfortable for him to move around in. The adjustable waist was a huge plus, especially for growing kids. It fit true to size overall, though the blazer sleeves were slightly long on my son. The pants had a nice slim look without being too tight. We paired it with white sneakers for a more modern look and it came out adorable. This would be perfect for weddings, graduations, concerts, communion, school events, or family photos. Overall, very happy with the purchase and would definitely buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
K
Verified Purchase
Kindle Customer
Draper, US
★★★★★ 5
Very Modern Handsome Suit
Color: Grey, Size: 7 Years, Color: Grey, Size: 7 Years
This is an incredibly sharp looking suit for the little guy. Great price and features, too. I made a mistake in sizing up instead of down and first one was too sloppy on him and would need alterations. He is thin and very thin in the waist. There is a lot of adjustment with buttons in waistband and coat hides the bunching. This shirt and coat will easily take a fuller body than slim I believe. He loves posing in it and feels very classy. Best purchase for a formal suit that will last longer than most kids clothes size wise. Felt bad about returning but careful folding and packing got it good as new.
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Reviewed in the United States on May 20, 2026
B
Verified Purchase
Berthav
Los Angeles, US
★★★★★ 5
Quality
Color: Black, Size: 7 Years, Color: Black, Size: 7 Years
Excellent quality, My son looks incredible
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
L
Lady Wescott
Fort Morgan, US
★★★★★ 4
Sharp Looking Kids Suit With One Missing Piece
Color: Navy, Size: 7 Years, Color: Navy, Size: 7 Years
I ordered this suit for my 6yo son in a size 7 so he would have a little room to grow and get more wear out of it, and sizing is perfect. He did not need it for any specific occasion, he just wanted a suit because apparently kindergarteners sometimes wake up and decide they are businessmen now. Let me start with the positives because there are a lot of them. This is a very well made suit. The jacket, pants, and dress shirt are all surprisingly nice quality. The fabric does not feel cheap or flimsy at all. The jacket has good structure, the buttons are well attached, the seams are clean, and all the little details like the collar and pockets look great. It honestly looks like a proper little formal suit. The pants are nicely made as well and pair perfectly with the jacket. The white dress shirt underneath is also good quality and completes the whole look. Overall, it is a really sharp outfit and would absolutely work for special occasions like weddings, recitals, formal events, church, or family photos. Now for the reason I am deducting one star. The listing specifically shows and mentions that this set includes a bow tie. That was actually the main reason I chose this particular suit over others. Some options only had a standard tie or no tie at all, but my son specifically wanted a bow tie. Unfortunately, the bow tie was not included with mine. That was definitely disappointing because it was one of the main selling points for me when choosing this set. Now I have to go find a separate bow tie that matches, which I was hoping to avoid. That said, I do want to be clear that this issue does not take away from the actual quality of the suit itself. The suit is genuinely very well made and looks fantastic on him. If your child needs a suit for a wedding, formal event, recital, or something similar, this would absolutely work. My son mostly just wanted a suit because he thinks it is cool, so now he has one and can show up to school looking like the smallest CEO in kindergarten. Overall, this is a very nice quality suit set. I just wish the bow tie that was advertised had actually been included.
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Reviewed in the United States on March 10, 2026
L
Verified Purchase
Liz
Pawtucket, US
★★★★★ 5
Good for the price
Color: Black, Size: 10 Years
Great suit for the price and it includes the shirt which It was a great surprise
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Reviewed in the United States on May 27, 2026

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