SKU: 72836356240

Hillman 5/16 in. D x 3/4 in. L Heat Treated Steel Hex Head Cap Screw, Coarse Thread, Grade 8, 100-Pack

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Description

Hillman 5/16 in. D x 3/4 in. L Heat Treated Steel Hex Head Cap Screw, Coarse Thread, Grade 8, 100-PackHillman Grade 8 Hex Head Cap Screws, 5 16 in. x 3 4 in. (100 Pack) Heavy duty Grade 8 hex head cap screws made from heat treated steel for high strength fastening. Sized 5 16 in. diameter by 3 4 in. length with coarse threads, ideal for machinery, automotive, and structural applications. Key Features: High Strength Grade 8: Heat treated steel delivers superior tensile strength for demanding applications. Coarse Thread: Provides secure fastening and

Hillman Grade 8 Hex Head Cap Screws, 5/16 in. x 3/4 in. (100-Pack)

Heavy-duty Grade 8 hex head cap screws made from heat-treated steel for high-strength fastening. Sized 5/16 in. diameter by 3/4 in. length with coarse threads, ideal for machinery, automotive, and structural applications.

Key Features:

  • High Strength Grade 8: Heat-treated steel delivers superior tensile strength for demanding applications.
  • Coarse Thread: Provides secure fastening and quicker assembly in tapped holes or with nuts.
  • Hex Head Design: Compatible with wrench or drill drivers for easy tightening and removal.
  • Washer Face Under Head: Enhances load distribution and resists loosening.
  • Bulk 100-Pack: Boxed packaging ensures ample supply for projects and maintenance.

Specifications Table:

Specification Details
Diameter 5/16 in
Length 3/4 in
Material Heat-treated steel
Finish Heat Treated
Grade 8
Thread Type Coarse
Head Type Hex head
Pack Quantity 100
Packaging Type Boxed
Each Weight 2.500 lb (package)

Frequently Asked Questions (FAQ):

Q: Are these screws fully or partially threaded?
A: They are partially threaded Grade 8 hex cap screws.

Q: What tools are recommended for installation?
A: Install with a wrench or a drill driver that fits the hex head.

Q: Do these work with standard nuts and washers?
A: Yes, they are designed for use with compatible nuts and washers matching the 5/16 in. coarse thread.

Q: What is the thread type?
A: Coarse thread.

Q: What applications are they suited for?
A: Ideal for automotive, machinery, and structural fastening where high strength is required.

Industrial Strength, Clean Precision

These Grade 8 hex cap screws bring a refined industrial edge to any project, pairing robust performance with crisp geometry. The heat-treated steel and coarse thread offer dependable grip while the hex head adds a graphic, utilitarian statement. Style them with black oxide hardware for a modern contrast in exposed mechanical details. A staple of elevated, hardworking design, they anchor spaces with confidence and clarity.

Upgrade your fasteners to Grade 8 strength—add this 100-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: 72836356240

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4.4 ★★★★★
Based on 5 reviews
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Product Reviews
M
Mark Weinberg
Chelsea, US
★★★★★ 5
Stable, attractive, and easy to turn into a table with your choice of top
Size: side table leg
The X-shape of the table legs - constructed with solid metal flanges, T-joints, X-joints and 1-inch diameter pipes - provides a strong and sturdy base for a wood top. The legs have adjustable feet pads to prevent scratches and ensure stability. Assembly of the legs is relatively simple (the instructions are clear) but you will need your own tools to attach a top. The industrial design is especially well suited to rec room or finished basement use. I am adding a 28" diameter raw edge slab of wood from a recently felled tree as the top and it is very attractive. (Photo unavailable because after I made certain it would work I sent the slab out for drying and finishing.) If you want a custom table and have a particular piece of wood you want to use, these legs are an excellent choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
G
Grammar Guru
Chelsea, US
★★★★★ 5
Very nice kit: Beware it is NOT heavy duty plumbing pipe though!
Size: side table leg
I want to give this kit a high rating, but I need to address the "truth in advertising" bit since there may be an important disconnect between what you think you are getting and what actually comes in the box. Black plumbing used for shelving or table legs is part of an important niche in interior design. I like the industrial loft look myself and have a variety of glass, steel, and masonry elements in my home. This kit fits that look and provides plenty of "strength" for most domestic uses, like shelves or coffee tables. But they are NOT "industrial pipe" or "maximum durability pipe." Note the phrase "cast iron finish feet," which together with the other claims might lead you to think these are cast plumbing fittings. They are NOT! The feet and flanges feel like electrical conduit fittings, and the pipe sections are likely aluminum. They might be electrical or they might be multi-use, lightweight pipe. While all this might lead you to think that you're getting a truly retro, heavy-duty pipe kit made of black plumbing pipe, you are not. But, does it matter? Depends. I find the lighter pipe's smooth finish a nice "tone-down" from the rough plumbing look. All together, this kit provides plenty of strength for most furniture and the rustic pipe look, but with a nicer, lighter finish. To me that is a plus--this is a very nice kit and costs less that if you'd pieced it together from real plumbing parts (I priced it out to compare), and looks retro but cleaner. I knew what to expect because while I got this kit free on Vine, I had purchased a nearly identical kit from another seller last year. So, I'm giving it 5 stars for what it actually is and for the price, JUST BE AWARE THE NARRATIVE IS MISLEADING. Which is unfortunate because just like some people might want the heavier pipe, I'm betting more would be attracted to the look with a cleaner, lighter feel.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 31, 2025
R
Verified Purchase
R
Massapequa, US
★★★★★ 5
Strong legs, somewhat industrial but trendy also
Size: side table leg
Good legs, some what utilitarian or industrial, they are strong as they are made out of pipe, and assembly is fairly easy once you get the idea of how it goes together. They are roughly 1.5 feet across maybe a bit less adjustable height on each leg, if you have wood floors you may want to put a pad under each leg as they are full metal pipes. Pretty interesting idea and does not cost much.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
N
Verified Purchase
Nc
Dallas, US
★★★★★ 4
Pretty good, take your time and install it well
Size: side table leg
Materials are pretty solid, but once assembled it’s not as sturdy as you would think it should be since the material itself was solid, i say give them a chance, everything out there that’s similar is way over priced
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
R
Verified Purchase
Roberta Mayes
Belleville, US
★★★★★ 5
Heavy duty legs for table.
Size: side table leg
Perfect legs for a table I am having made. I have an cottonwood slice. It's heavy and needed something substantial. These are perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026

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