SKU: 26957092178

Hillman 5/16 in. Diameter x 1-3/4 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 100-Pack

Sale price$28.79 Regular price$31.99
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Description

Hillman 5/16 in. Diameter x 1-3/4 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 100-Pack5 16 in. x 1 3 4 in. Hex Head Cap Screw (100 Pack) Durable Hillman Grade 5 hex head cap screws made from heat treated zinc steel for reliable fastening in general construction and repair. The partially threaded shank provides strong clamping force, while the corrosion resistant finish stands up to demanding environments. Key Features: Grade 5 Steel Strength: Heat treated zinc steel for dependable performance in structural and repair applications

5/16 in. x 1-3/4 in. Hex Head Cap Screw (100-Pack)

Durable Hillman Grade 5 hex head cap screws made from heat-treated zinc steel for reliable fastening in general construction and repair. The partially threaded shank provides strong clamping force, while the corrosion-resistant finish stands up to demanding environments.


Key Features:

  • Grade 5 Steel Strength: Heat-treated zinc steel for dependable performance in structural and repair applications
  • Corrosion-Resistant Finish: Zinc treatment helps protect against rust and wear
  • High-Torque Hex Head: Hex cap design with machine threads supports strong tightening with wrenches or sockets
  • Partially Threaded Shank: Promotes superior grip and reduces shear movement between materials
  • Bulk Value Pack: 100-piece pack for jobsite efficiency and shop inventory

Specifications Table:

Specification Details
Diameter 5/16 in.
Length 1-3/4 in.
Head Type Hex head cap screw
Material Heat-treated zinc steel
Thread Machine thread, partially threaded
Grade Grade 5
Pack Quantity 100 pieces

Frequently Asked Questions (FAQ):

Q: What tools are recommended for installation?
A: Use a wrench or socket sized for the hex head; pre-drilling a hole matching the bolt diameter is recommended for best results.


Q: What grade are these cap screws?
A: They are Grade 5, suitable for most general-purpose fastening when matched with Grade 5 nuts and washers.


Q: Are these fully threaded?
A: No, they are partially threaded to maximize clamping force and reduce shear.


Q: What materials are these made from?
A: Heat-treated zinc steel for strength and corrosion resistance.


Q: Can these be used outdoors?
A: Yes, the zinc finish provides corrosion resistance; however, for harsh or marine environments, consider additional protection.


Industrial Poise in a Polished Package

These hex head cap screws bring a quiet, utilitarian elegance to exposed mechanical details. The heat-treated zinc finish feels crisp and intentional, letting hardware become part of the story. Use them with blackened steel brackets or raw oak to create a tailored contrast. It’s the refined hardware choice that elevates everyday assembly to luxe craft.


Stock your shop with this 100-pack of Grade 5 Hillman cap screws for strong, corrosion-resistant fastening that’s ready for any project.

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: 26957092178

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4.5 ★★★★★
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Verified Purchase
David Williams
Dallas, US
★★★★★ 5
Use as directed, when needed, and you'll be good to go.
A must have if you have a need for a ZDDP additive. This won't fix your worn valve seats, leaking piston rings, seasonal depression or gout but it will improve the lubricating properties of a quality oil in a properly maintained motor for your longevity goals.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
M
Verified Purchase
Michael R.
Alexandria, US
★★★★★ 5
Every oil change for bikes
I use this in my bike every oil change
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
L
Verified Purchase
Larry Musgrave
Cuba, US
★★★★★ 5
Buddy filled diesel skid steer with automotive gas engine oil. Used this to help.
We all know that guy who will buy a $65,000 machine and then only service it once a year with the cheapest oil on the shelf from Rural King or some other place with ultra cheap, home branded, questionably quality oil. Yep. That is my good buddy. So I go to the shop a couple weeks back and he is re-filling the skid steer engine with some ultra cheap, totally not to spec, gas engine oil. I question him and he states that it is perfect oil for the machine being 5W-30. I ask him if it meets the SAE ratings for the diesel, he repeats back that yep... it is 5W-30. So I go grab his New Holland book (C232 track skid steer) and look up the oil requirements, then I look at this junk oil, and I try to explain to him the SAE designations on the back of the bottle and the SAE requirements in the book. He looks at me like I have 3 heads and repeats that it is 5W-30, it is totally good. Someone.... kill me please! He has no clue what I am trying to explain. So I couldn't sleep knowing what he is doing, and I ran to Amazon to see if I can at least get zinc to add to the wrong oil and try to help the cam followers and rockers survive this next year. I found this. I ordered a few bottles and had them shipped to his shop, and I explained to him that these need to be dumped in to at least make an attempt in not prematurely wear the engine that likely is worth $20,000 or more! So the real question is, will he actually dump these into the machine, or will he toss them on a shelf never to be seen again? We may never know. But I bet next winter he will once again shop for the cheapest oil on earth to put in a machine that costs as much as some peoples home. He is who he is, you can never change that.
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Reviewed in the United States on February 6, 2023
J
Verified Purchase
J. Bee
Battle Creek, US
★★★★★ 5
Works good for my old tractor
Put it in my old 1953 Ford Golden Jubilee
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Reviewed in the United States on September 28, 2025
L
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LovesAmazon24
Phoenix, US
★★★★★ 5
High quality replacement clips. Highly recommend.
I used these when replacing the headlight assemblies on my 2011 Honda CR-V. A few clips were already missing before I even started taking the bumper off, and of course a couple more didn’t survive the job. These fit perfectly and snapped right in with no issues. If you’re missing clips or break some while doing a repair, these are a simple fix that gets everything secured again. Very good deal.
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Reviewed in the United States on March 8, 2026

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