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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4.7 ★★★★★
Based on 24 reviews
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J
Verified Purchase
Jim Wallace
Whiting, US
★★★★★ 5
Save some money by doing your own cabin filter change! (You won't notice a difference).
So, one day I was getting an oil change at the dealership, and the associate told me that cabin filter was pretty dirty, which I believed because of the places I take the car, and she said that they could change it while they were finishing up the rest of their inspection, since they already had it apart. I asked her "How much?", and then we both had a laugh when she said "$90." I told her I'd take care of it. It took two days for Amazon to get a replacement filter to me, twenty minutes to watch a You Tube video showing how to replace the cabin filter on my car (I watched it twice), and then about twenty-five minutes to replace the filter itself--I keep a messy glove compartment, so a good portion of the time was loading and unloading that nightmare. In the end, under $15 for the filter, maybe 45 minutes to watch and replace, and the cabin filter hasn't been this good since I first bought the car. This replacement version was as good as the OE filter, fit exactly the same, there's no difference in airflow that I can tell, and so far (6 months later), it seems to be holding up pretty well. We'll see what it is like after a year. I did get the oil changed about a week ago, and the technician didn't raise any alarms about the filter, so everything seems to be working. $90 for a new filter? You can do it yourself cheaper.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
C
Verified Purchase
chad martin
Belleville, US
★★★★★ 4
Fresh Air Upgrade for My 2024 Impreza
Installed this in my 2024 Subaru Impreza, and it fit perfectly—no issues. The air smells noticeably cleaner now, and it took less than 10 minutes to swap out. The carbon and HEPA filtration does a great job clearing out odors, dust, and pollen—definitely an upgrade over the factory filter. The build feels sturdier than the OEM version, though it does have slightly fewer pleats. Might mean it needs replacing a bit sooner, but for the price and performance, I’m fine with that tradeoff. If you’re looking for a quick, affordable way to improve your cabin air, this one’s a solid pick. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 26, 2025
G
Verified Purchase
Gram21
Omaha, US
★★★★★ 5
Well built, good fit.
I like it so well, I just bought two more to keep on the shelf for when the price doubles. Seems better built than oem, but I don't know how you can judge the filtration; seems good though.
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Reviewed in the United States on May 6, 2026
L
Verified Purchase
LJ
Phoenix, US
★★★★★ 5
Great product
Perfect fit for 21 Cross Trek
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Reviewed in the United States on February 12, 2026
M
Verified Purchase
Mr Frosty
San Leandro, US
★★★★★ 5
Good fit, good value
Style: CF12436 Classic, Style: CF12436 Classic
Purchased this filter for my 2023 Outback. First off changing the cabin filter on this model Subaru is amazingly easy and can be done with no tools and no more then 5 minutes. Pictures posted show packaging, the paper "Blue" filter side, the "Black" charcoal side and the foam outer edge. The filter is well made and is very sturdy as the outer shell is plastic vs. other paper filters that are more flexible. Holding the filter in your hand and giving it a slite shake you can hear the activated charcoal within it. After installing the filter I had a few trips in the car, did I notice any difference in the air quality coming into the cabin....... no. But does this mean its not working? also no. What I can say is the filter fit snug and left no gaps, and with the plastic surroundings and foam in sure the filter will not be letting anything get by as it passes through the system. All and all this filter is well made and sturdy, and seems to be a good value with other paper only filters being about the same price.
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Reviewed in the United States on May 4, 2026

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