SKU: 78777566802

Hillman 7/16 in. Diameter x 3-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 25-Pack

Sale price$28.79 Regular price$31.99
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Description

Hillman 7/16 in. Diameter x 3-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 25-PackHillman Grade 5 Hex Head Cap Screws, 7 16" x 3 1 2", 25 Pack Durable grade 5 hex head cap screws for heavy duty fastening in wood or metal. Made of steel with a heat treated zinc finish for added strength and wear resistance, partially threaded for secure clamping. Ideal for applications requiring a hex bolt tightened with a wrench or drill. Key Features: Grade 5 Strength: Heat treated steel provides reliable tensile strength for demanding projects

Hillman Grade 5 Hex Head Cap Screws, 7/16" x 3-1/2", 25-Pack

Durable grade 5 hex head cap screws for heavy-duty fastening in wood or metal. Made of steel with a heat-treated zinc finish for added strength and wear resistance, partially threaded for secure clamping. Ideal for applications requiring a hex bolt tightened with a wrench or drill.


Key Features:

  • Grade 5 Strength: Heat-treated steel provides reliable tensile strength for demanding projects
  • Corrosion-Resistant Finish: Zinc plating helps resist rust and wear in indoor and outdoor environments
  • Washer Face Head: Built-in bearing surface under the hex head for improved sealing and load distribution
  • Partially Threaded Shank: Offers strong clamping force and alignment where a hex bolt is required
  • Convenient Bulk Pack: 25 boxed screws sized 7/16 in. diameter x 3-1/2 in. length

Specifications Table:

Specification Details
Diameter 7/16 inch
Length 3-1/2 inch
Material Steel
Finish Heat Treated Zinc
Grade 5
Head Style Hex head with washer face
Thread Type Coarse (USS)
Threading Partially threaded
Number in Package 25 pack
Packaging Type Boxed
Tightening Method Wrench or drill
Category Hex Bolts
Package Height 3.5 in
Package Width 4.3 in
Package Length 4.3 in
Package Weight 4.3 lbs

Frequently Asked Questions (FAQ):

Q: Are these fully or partially threaded?
A: They are partially threaded along the shank.


Q: What tools are needed for installation?
A: Tighten with a wrench or a drill using the appropriate hex socket or driver.


Q: What is the material and finish?
A: Steel with a heat-treated zinc finish for enhanced strength and wear resistance.


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


Q: Can these be used where a hex bolt is specified?
A: Yes—hex cap screws serve the same purpose and include a washer face under the head.


Industrial polish with purposeful precision

This hex cap screw brings a clean, engineered elegance to exposed hardware moments. The zinc finish offers a subtle shimmer that pairs beautifully with raw woods and painted metals. Use them to anchor custom shelving brackets or a statement door strap for a refined, utilitarian edge. It’s a small detail that elevates everyday fixtures to a more sophisticated, enduring standard.


Secure your project with grade 5 strength—add this 25-pack to your cart and fasten with confidence.

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: 78777566802

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4.5 ★★★★★
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Tara U.
Waukegan, US
★★★★★ 5
beautiful and sturdy
Size: 48 inch 2 Tier
The shelf is beautiful and sturdy. The only small complaint are the instructions to put it together are deceiving because pieces were put together for shipping purposes (we assume) but didn't actually go together which took us a few times to figure out. I recommend putting it together off the wall before trying it on the wall so you know what pieces go where.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2026
N
Verified Purchase
Nancy
Massapequa, US
★★★★★ 1
Cheaply made
Size: 48 inch 2 Tier
I would not recommend this shelf. There are no instructions included - just a simple drawing of putting it together but nowhere says what drill bit size to use for the plastic anchors which are square on the end and not round. In addition, you cannot fully tighten the iron brackets or they won’t alight on the wall to hang the shelf. Each piece of metal piping has part of the black coating stripped off as well. And on top of that, the bottom of each shelf is unfinished and looks as though they used a filler to hide holes in the shelf. Not worth the money or the hassle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
K
Verified Purchase
Kindle Customer
Alexandria, US
★★★★★ 5
Looks like it is in picture and very sturdy.
Size: 48 inch 2 Tier
Loved this looks just like picture and is easy to assemble.
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Reviewed in the United States on April 30, 2026
K
Verified Purchase
Kris Feucht
Alexandria, US
★★★★★ 5
Great product
Size: 48 inch 2 Tier, Size: 48 inch 2 Tier
Love! great value, heavy duty, perfect for my space.
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Reviewed in the United States on January 31, 2026
S
Verified Purchase
Sara
Lexington, US
★★★★★ 4
Good shelf to upgrade my awkward kitchen!
Size: 42 inch 2 Tier
This shelf is exactly what I was looking for for my awkward kitchen in my new house. Don't mind the plywood walls (who knows what the previous owners were thinking 🤣) but anyways, we had this awkward gap between the kitchen counters and the stove, so I got a stainless steel shelf to fill the gap and add some more counterspace, and I found this industrial style pipe shelving, which was the perfect size and height to fit in this gap on the wall and give us more storage/organization space. It's easy to assemble and hang up, and seems very strong and sturdy. It's a little heavy, but lightweight enough to hang easily. Right out of the box, it was disappointing to see some scuffs in the black paint on the piping, especially for the price. Luckily, the biggest scuff is in a pretty inconspicuous space so it's not a big deal. Definitely not worth returning to see if another one wouldn't have any scuffs (especially since many of the other reviews mentioned scuffs too). It's wabi sabi I suppose 😅 Also, not a single extra screw or hardware was included. Not a big deal, but screws are cheap enough to through in one extra just in case one is missing or lost. Overall, mostly happy with the purchase. The wood is solid and the shelf looks nice in my kicthen!
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Reviewed in the United States on January 27, 2026

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