SKU: 20374358317

Hillman 5/8 in. D x 3 in. L Heat-Treated Steel Hex Head Cap Screw, Grade 8, 25-Pack

Sale price$68.39 Regular price$75.99
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Description

Hillman 5/8 in. D x 3 in. L Heat-Treated Steel Hex Head Cap Screw, Grade 8, 25-PackHillman Grade 8 Hex Head Cap Screws, 5 8" x 3", 25 Pack Heavy duty Hillman hex head cap screws deliver Grade 8 strength for demanding assemblies. Heat treated steel with a washer face under the head provides secure clamping and long lasting wear resistance. Key Features: Grade 8 Strength: Heat treated steel for high tensile performance in heavy duty applications Washer Face Head: Built in bearing surface under the hex head improves load distribution

Hillman Grade 8 Hex Head Cap Screws, 5/8" x 3", 25-Pack

Heavy-duty Hillman hex head cap screws deliver Grade 8 strength for demanding assemblies. Heat-treated steel with a washer face under the head provides secure clamping and long-lasting wear resistance.


Key Features:

  • Grade 8 Strength: Heat-treated steel for high tensile performance in heavy-duty applications
  • Washer Face Head: Built-in bearing surface under the hex head improves load distribution and sealing
  • Partially Threaded Shank: Added shear strength where it matters; coarse thread for quick starts
  • Durable Finish: Yellow dichromate/heat-treated finish enhances corrosion and wear resistance
  • Bulk Convenience: 25-pack for jobsite efficiency and consistent hardware matching

Specifications Table:

Specification Details
Brand Hillman
Diameter 5/8 inch
Length 3 inch
Head Type Hex head with washer face
Material Steel
Grade Grade 8
Thread Type Coarse
Threading Partially threaded shank
Finish Heat-treated yellow dichromate-style finish
Number in Package 25 pack
Packaging Type Boxed
Tightening Method Wrench or drill/driver
Category Hex Bolts
Unit of Measurement Imperial
Package Dimensions (L x W x H) 5.3 in x 4.3 in x 3.3 in
Package Weight 7.7 lbs

Frequently Asked Questions (FAQ):

Q: What size are these screws?
A: They are 5/8 in. diameter by 3 in. length, coarse thread.


Q: Are these fully threaded?
A: No. They are Grade 8 and partially threaded along the shank for added strength.


Q: What tools are needed for installation?
A: Tighten with a wrench or compatible socket/driver on the hex head.


Q: What material and finish are used?
A: Heat-treated steel with a yellow dichromate-style finish for strength and wear resistance.


Q: How many are included?
A: This box contains 25 hex head cap screws.


Industrial Strength, Streamlined Form

The bold geometry of a hex head brings a clean, purposeful rhythm to utility spaces. I love the subtle sheen of heat-treated steel—quietly powerful, impeccably functional. Use these Grade 8 cap screws to anchor butcher-block islands or exposed shelving for an honest, refined industrial note. They’re the precision detail that elevates hardworking design into everyday luxury.


Choose these Grade 8 Hillman cap screws for reliable, heavy-duty fastening that lasts—add the 25-pack to your project list 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: 20374358317

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4.5 ★★★★★
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J
Verified Purchase
jin
Grantham, US
★★★★★ 5
Most comfortable pillow I’ve ever slept on
Size: Queen (1 Count), Color: Crescent White(cooling)
This is the most comfortable pillow I have ever slept on. It doesn't mash down like other pillows. Cradles my neck perfectly plus it’s cool. I broke my neck a couple of years ago and this pillow feels very good and comfortable. Definitely recommend to everyone. Ive used it since May and it’s retained its shape.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
A
Verified Purchase
AreTrue
Alexandria, US
★★★★★ 4
Smell
Size: Queen (2 Count), Color: Original White (Cooling)
The fact that there are not more comments on the smell of these pillows has me worried about some of yall. Listen, I LOVE the weight, and the firmness, it’s perfect for that. However, these pillows are RANK. They have a very strong mildew-ish smell that lingers. I took the outer cover off and washed it and let the pillow air out for a few days, the smell is still very strong when you press your face against it, which one does because it is in fact designed for that purpose. It smells so bad. It’s nauseating. I can smell it through two pillowcases and blanket that I threw on top of them hoping an extra layer would trap the smell. I’ll bake them in the Texas sun tomorrow and hope that helps, because otherwise these are the perfect pillows for someone who wants to feel like they are hugging a torso but can’t stand the sound/feel of someone else breathing. I don’t know…4 stars, if the smell goes away I’ll come back. Update: many many days later. Either they don’t really smell anymore or I got use to it. They’ve held their firmness and shape well. I like them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
S
Verified Purchase
Samantha
Waukegan, US
★★★★★ 5
Actually Cooling Pillow
Size: Queen (1 Count), Color: Original White (Cooling)
This is a really nice pillow, I was worried it would be too soft or too firm but it's just right and it's actually cooling, it feels cool every time I touch it. I've noticed an improvement in sleep since using it. Would recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
T
Verified Purchase
Tyler and Kaela
Lowell, US
★★★★★ 5
Repurchased in King Size – Still Love These Cooling Pillows
Size: King (2 Count), Color: Original White (Cooling), Size: King (2 Count), Color: Original White (Cooling)
After using the queen-size version of these pillows for over a year, we purchased the king-size set when we upgraded to a king mattress. Both my husband and I really like them. The cooling feature works well, and we like that each side feels different—when I run cold, I use the softer bamboo side, while my husband prefers the cooler side since he tends to sleep hot. They fit well in our king-size pillowcases and feel supportive in all sleeping positions, whether I’m on my stomach, side, or back. I also appreciate that you can remove some of the filling to adjust the firmness. The covers are washable, which makes them easy to maintain. Overall, we’re very happy with this repurchase and the long-lasting comfort.
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Reviewed in the United States on April 15, 2026
M
Verified Purchase
Mystery Fan
Houston, US
★★★★★ 3
Not great at cooling
Size: Queen (2 Count), Color: Original White (Cooling)
Each pillow cover has 2 sides, one marked for cooling, and the other a different fabric. The cooling side is about the same effectiveness as having a silk or satin pillow cover. It's only cool when you first touch it. The cooling side doesn't seem to absorb or wick moisture, so if you are sweaty - it keeps the moisture in place. You'll definitely want a regular pillow case over the pillow cover. In fact, if you suffer from night sweats, the non-cooling side is actually more comfortable. The pillow fill is ample, and simple to squish around for more support for your neck, etc. Think bean bag. But it will retain your impression after use. I find I need to do as I did when I had down pillows - give it a few good shakes in the morning when I make the bed to get it evened out for the coming night. In all, it is a well-made and comfortable pillow to sleep on, but it does not excel in cooling.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

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