Hillman 5/16 in. Diameter x 1-3/4 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 100-Pack
SKU: 26957092178

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

$28.79 $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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4.8 ★★★★★
Based on 78 reviews
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Product Reviews
C
Celeste
Birmingham, US
★★★★★ 5
Perfect Sofa-Side Charging Hub
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I picked this power strip mainly to use next to my sofa, where I usually charge my tablet, phone, and laptop while relaxing in the evening. Having 11 AC outlets and multiple USB ports in one place has made that corner much more organized, and I no longer have chargers scattered everywhere. The layout is well thought out. Larger plugs don't block neighboring outlets, and the flat angled plug fits nicely behind furniture. The 5-foot cord gives enough flexibility to position the strip where it's most convenient. I also like having both USB-A and USB-C ports available for smaller devices. For phones, tablets, earbuds, and similar electronics, the built-in USB ports have been very useful. For my everyday use, charging personal devices and powering small electronics, the unit has performed as expected. The overload protection switch and built-in safety features provide additional peace of mind. Overall, this has been a practical solution for adding more outlets to an older two-prong receptacle while keeping my charging area tidy and easy to access.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Amazon Customer
Belleville, US
★★★★★ 1
Major Safety Red Flag! 3 Prong Outlets, 2 Prong Plug, This Does Not Provide A Grounded Connection!
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has a compact design, a convenient outlet layout, and USB ports, so on the surface it looks useful. The patented three-row layout is clever for spacing the outlets, but that only applies to how the outlets are positioned. It does not change how the strip is actually powered or protected. The problem is the safety design. It has 11 three-prong outlets, but the wall plug itself is only two-prong. Without a ground prong, it is not grounded. The two flat prongs are hot and neutral only, so this does not provide the grounded protection that the three-prong outlets appear to suggest. That also makes the surge protection claims highly questionable to me. A real grounded surge protector should have a grounding path for excess surge energy. With only a two-prong plug, I would not trust this to provide the kind of surge protection people generally expect when plugging in electronics or grounded devices. The manual mentions surge protection, ground protection, short-circuit protection, over-current protection, over-voltage protection, over-heat protection, and UL 1363 safety standards, but I could not find any visible UL, ETL, or similar safety certification mark on the unit or paperwork. The only marking I saw was FCC, which is not the same thing as electrical safety certification. Given the two-prong plug and three-prong outlets, those protection claims feel dubious at best and misleading at worst. The USB charging is also underwhelming. The total USB output is listed as 24W, which is not much for today’s devices, especially when that power is shared across multiple ports. We frequently use 35W or higher from a single USB charger, so I would not buy this for fast or modern device charging either. Because of the two-prong plug paired with three-prong outlets, I will absolutely not use this. I do not want a power strip that makes devices appear protected or grounded when they are not. For me, this is not a small design issue. It is a serious safety concern.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
Y
Yuki WONG
Dallas, US
★★★★★ 3
Convenient Design but Raises Some Safety Concerns
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
As other reviews have mentioned, this power strip does not provide true grounding protection. It allows devices with three-prong plugs to connect through a two-prong wall outlet, but the strip itself still relies on a two-prong connection. Because of that, I think it’s important to understand the potential safety limitations before using it, especially with higher-powered electronics. It does offer a large number of outlets and USB ports, which is convenient for older homes with limited access to modern plugs. However, considering the price, there are safer and more reliable alternatives available that may be a better long-term choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
S
Verified Purchase
shari
Los Angeles, US
★★★★★ 5
Great little power strip.
Size: 6 Outlets, Style: Desk Socket - White
I used this in my garage as a battery charging station for all my cordless tools. BONUS that is has USB & USB-C that charges my flashlight and phone when I need to plug in! It's super easy to mount.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
S
Verified Purchase
SMD
Waukegan, US
★★★★★ 5
Perfect just what I was looking for!
Size: 6 Outlets, Style: Desk Socket - Black
This product is great! I bought it to mount under my new desk. It comes with two-sided sticky tape which worked out great. Now all my cords are hidden! perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026

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