Hillman 5/8 in. Diameter x 2-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 25-Pack
SKU: 96422018742

Hillman 5/8 in. Diameter x 2-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 25-Pack

Sale price$43.19 Regular price$47.99
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Description

Hillman 5/8 in. Diameter x 2-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 25-PackHillman Grade 5 Zinc Hex Head Cap Screws, 5 8" x 2 1 2", 25 Pack Heavy duty Grade 5 hex head cap screws crafted from steel with a heat treated zinc finish for strength and wear resistance. Ideal for fastening into tapped holes or with a nut, featuring a washer face under the head for a secure seal. Partially threaded shank provides robust clamping in structural and machinery applications. Key Features: Grade 5 Strength: Heat treated steel with zinc

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

Heavy-duty Grade 5 hex head cap screws crafted from steel with a heat-treated zinc finish for strength and wear resistance. Ideal for fastening into tapped holes or with a nut, featuring a washer face under the head for a secure seal. Partially threaded shank provides robust clamping in structural and machinery applications.


Key Features:

  • Grade 5 Strength: Heat-treated steel with zinc finish resists wear and boosts durability
  • Secure Seal: Washer face under the hex head helps distribute load and reduce leaks
  • Partial Thread Design: Coarse thread with unthreaded shank for stronger clamping
  • Versatile Fastening: Use with a nut or into a tapped hole; tighten with wrench or drill
  • Bulk Value: Convenient 25-pack for shop, jobsite, or maintenance stock

Specifications Table:

Specification Details
Diameter 5/8 inch
Length 2-1/2 inch
Material Steel
Finish Heat Treated Zinc
Grade 5
Head Type Hex head with washer face
Thread Type Coarse (USS)
Threading Partially threaded along shank
Number in Package 25
Packaging Type Boxed
Tightening Method Wrench or drill
Package Height 3.2 in
Package Width 4.3 in
Package Length 5.3 in
Package Weight 6.8 lbs

Frequently Asked Questions (FAQ):

Q: Are these bolts fully threaded?
A: No. They are Grade 5 hex cap screws with a partially threaded shank.


Q: What tools are recommended for installation?
A: Tighten with a wrench or compatible driver; a drill with a hex socket can also be used.


Q: Can these be used outdoors?
A: The zinc finish offers corrosion resistance for general use, but for harsh or marine environments consider galvanized or stainless options.


Q: What thread type do they use?
A: Coarse thread (USS).


Q: Do they include nuts or washers?
A: No. This is a 25-pack of screws only; purchase compatible nuts and washers separately.


Industrial polish with steadfast strength

Clean, zinc-plated steel lends a crisp industrial note while the hex head profile adds graphic precision. The partially threaded shank offers balanced proportion—form meeting function with confident simplicity. Style these fasteners in exposed hardware moments on workbenches or utility shelving for a refined, utilitarian edge. A smart essential that brings dependable performance to elevated, modern projects.


Stock your toolbox with dependable Grade 5 strength—add this 25-pack of Hillman hex 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: 96422018742

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Peter Anfang
Bozeman, US
★★★★★ 5
Exactly what I expected!
Style: 20W_USB-C, Size: 6FT, Style: 20W_USB-C, Size: 6FT
Perfect for recessed lighting in our shiplap wall to go behind the TV. I will be buying these again for future projects I have planned!
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Reviewed in the United States on March 31, 2026
A
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Amazon Customer
Lake Worth, US
★★★★★ 3
Multiple ports
Style: 20W_USB-C, Size: 10FT
The usb outlet broke within a week of purchase. The rest of the outlets work perfectly. Like that it has multiple ports to plug in.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2026
T
Verified Purchase
Treats86
Natrona Heights, US
★★★★★ 5
Amazing. A bit of a job to set it up but worth it!
Color: Black, Color: Black
Excellent quality. Sturdy and strong. The screws that come with it are awful. Get yourself some different ones. Takes a while to set it up and get it all measured. I did it while I was setting up my new Flexi-spot E7 Plus standing desk. Wanted to get it all done at the same time. At first. I thought it might be overkill, but I am sooooo glad I did get this. Now my computer moves along with the desk. It looks great. I bet it has improved the air flow around my computer as well. Looks sleek and cool. I might have set it a bit too tight around my case and as a result I have to shimmy it to get it out of the holder if I have to do any work on the computers internals. But at least I know it's secure. My suggestion would be to leave a little bit of slack to avoid this in your setup. Maybe like a 1/4 inch would be ok. The pads should hold it in place anyway. May loosen mine up if I find the time. But it feels totally secure on the desk with no wobble or shaking. Great product. Also I'm a woman in my late fifties 😃and I was able to set it all up on my own. So don't be intimidated ladies, you can do it too. I also bought two of the ultimate set up cable management trays. Great products. Note for anyone from the Ultimate Setup company who might read this. Please provide better quality wood screws and some extra ones) I stripped three of the cheap ones that came with this. And it took forever to drill them in because they weren't strong enough. Then it would be perfect.
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Reviewed in the United States on November 17, 2025
N
Verified Purchase
Norman D Warren
Pawtucket, US
★★★★★ 5
Solid, simple and perfect.
Color: Black, Color: Black
Great simple design. The quality is evident in the thickness of materials. The assembly instructions, hardware and tools provided help minimize the time spent from opening the box to install. This product is packaged well and shipped with the customer convenience in mind. Well done!
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Reviewed in the United States on May 26, 2026
A
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Ashton Raum
Grantham, US
★★★★★ 5
Awesome quality
Color: White, Color: White
Take your time installing! It comes with all the instructions and templates. Make sure you’re screwing this into solid wood. I would not recommend you hang your expensive PC from a particle board table. My Pc fits in well and it’s compatible with a ton of different sizes. Mine has been mounted under my desk for about 6 months and is rock solid. I will say, mine is balancing in there. If I don’t have it at its center of gravity, it could tip out. You can adjust it with the various screw holes but make sure you mount it into something solid.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026

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