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Description
Hillman 3/8 in. Dia x 1-1/2 in. L Heat-Treated Zinc Steel Hex Head Cap Screw, 100-PackHillman Grade 5 Hex Head Cap Screw, 3 8 in. x 1 1 2 in., 100 Pack Heavy duty hex head cap screws engineered from heat treated zinc plated steel for strong, wear resistant fastening. Grade 5 strength with partially threaded shank and washer face under the head delivers secure clamping in machinery, automotive, and structural applications. Key Features: Grade 5 Strength: Heat treated steel provides robust tensile strength for demanding projects
Hillman Grade 5 Hex Head Cap Screw, 3/8 in. x 1-1/2 in., 100-Pack
Heavy-duty hex head cap screws engineered from heat-treated zinc-plated steel for strong, wear-resistant fastening. Grade 5 strength with partially threaded shank and washer face under the head delivers secure clamping in machinery, automotive, and structural applications.
Key Features:
- Grade 5 Strength: Heat-treated steel provides robust tensile strength for demanding projects
- Corrosion-Resistant Finish: Zinc plating helps protect against rust and wear
- Washer Face Head: Built-in washer face improves seal and load distribution under the head
- Partially Threaded Shank: Coarse threads with an unthreaded section for precise alignment and strong clamping
- Versatile Use: Ideal for use with a nut or tapped hole; tighten with a wrench or drill
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 3/8 inch |
| Length | 1-1/2 inch |
| Material | Steel |
| Finish | Heat Treated Zinc |
| Grade | Grade 5 |
| Head Type | Hex head with washer face |
| Thread Type | Coarse |
| Threading | Partially threaded along shank |
| Number in Package | 100 |
| Packaging Type | Boxed |
| Use | For use with a nut or in a tapped hole; tighten with a wrench or drill |
| Package Height | 3.5 in |
| Package Width | 4.3 in |
| Package Length | 4.3 in |
| Package Weight | 5.6 lbs |
Frequently Asked Questions (FAQ):
Q: Are these fully or partially threaded?
A: They are Grade 5 cap screws with a partially threaded shank and coarse thread.
Q: What size and length are the screws?
A: Each screw is 3/8 inch diameter and 1-1/2 inch length.
Q: Can these be used outdoors?
A: The zinc finish offers basic corrosion resistance, suitable for many indoor and light outdoor applications; for harsh environments, consider galvanized or stainless options.
Q: Do they have a built-in washer?
A: They feature a washer face under the hex head to improve sealing and load distribution.
Q: How many are in the box?
A: The package contains 100 screws.
Industrial polish that anchors the look
These hex cap screws bring a crisp, tailored hardware detail that feels both utilitarian and refined. The zinc sheen adds a subtle gleam, while the washer-faced head creates a clean, purposeful silhouette. Use them to unify exposed-joint furniture or workshop shelving for a cohesive, engineered aesthetic. A small detail with big impact—essential hardware for elevated, durable design.
Secure your projects with Grade 5 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:
- 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
4.6 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Great, Large sturdy cabinet
Color: Black, Size: 23x29, Color: Black, Size: 23x29
I was looking to add more storage to my tint bathroom, and so a cabinet for over the toilet was my first plan of attack. This cabinet is large, has a semi open niche (protected from hella dust), and the doors match the style of my builders vanity, so i went with it.
Assembly:
It was VERY easy to assemble. Some things you get off amazon are a nightmare, this was thankfully pretty quick and sturdy. It came with all the hardware I needed, and the only assembly tool was a Philips Head screwdriver, and the different pieces were labeled well.
Mounting:
THE WALL ANCHORS INCLUDED ARE TRASH. Thank you for attending my TED talk. The cleat for mounting is about a foot long, so while i couldnt get it mounted in 2 studs, i mounted one side in a stud and used a toggle bolt for the other side. I would HIGHLY RECOMMEND using a toggle bolt for something this heavy, and having one end directly in a stud. The french cleat mount meant i could slide the cabinet a bit to center it above the toilet, but with some lifting. That isnt gonna move at all with everyday use. I also like that i can take it down and put it back up easily.
Smell:
I didnt notice any weird smells on mine, tho it did sit in my hallway for about a week before i got around to assembling it.
I used some stick and peel tile to dress up mine, and ill also add some hardware to make it look more bespoke, but overall im super thrilled with it. Would recommend.
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Reviewed in the United States on October 10, 2023
★★★★★ 4
Beautiful and Sturdy
Color: Texture Grey, Size: 25x30, Color: Texture Grey, Size: 25x30
The cabinet relatively high quality and sturdy. Assembly was not difficult, it took less than an hour, and the color is beautiful and exactly as pictured. The soft close doors are such a big bonus as I tend to accidentally slam doors shut so these doors are me-proof. It arrived in well insulated packaging, there were no missing parts, and the instructions were not difficult to decipher. However, I do have a few items that bothered me enough to deduct a star from the rating
1) The wall mounting system, has predrilled holes that are not the standard 16 inch apart per house's studs. The mounting hardware was subpar and we ended up procuring more sturdy mounting hardware. The cabinet is fairly heavy when it's empty so we wanted to ensure adequate support. The cost of the cabinet is higher than many others I looked and would have liked better mounting hardware - minus one star
2) I wish I had paid closer attention to the shelf heights as the clearance from the middle shelf to the top shelf when it's in the top shelf is in the highest position (top shelf is the only shelf that can be moved) was not tall enough to hold my large industrial size shampoo and conditioner bottles so storage was a little disappointing but I consider it my mistake for not measuring before purchasing - no rating deduction
3) We tried multiple configurations to try and get the doors to perfectly align and could not make it happen. Alignment was disappointing but again I am going to blame that on operator error - no rating deduction
Overall, it is a nice cabinet and works well and looks good. I would absolutely recommend.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Lovely cabinet but needs time to put together!
Color: White, Size: 23x29
The overall cabinet is what I was looking for. Very sturdy and good looking. The main problem my husband had was with the directions to put it together. The pictures were hard to see and the majority of written directions were hard to understand. Definitely took longer to put together than should have taken. But when it was completed and hung, I have to say I love it. Be prepared to have patience and enough time set aside to put it together.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Solid cabinet; all aligns well
Color: White-1927, Size: 19x27
Amazon declined my first buy/ship if this cabinet as it was damaged when it reached Amazon. That was fine, but I still had to go thru ‘return’ process of Amazons, w/o a product to return; so I used their ‘chat feature’ to explain—went smoothly, and they secured the replacement for me; I just need to check latest bill to be sure I was only charged once. OK, now onto the cabinet: Solid materials (for MDF-which I generally avoid), and assembled + installed in just 1hr. Btw, I add ‘glue’ the the provided 8 wood dowels used for assembly. The doors hinge adjustments are easy to align doors for final finish. While this cabinet ‘hangs’ on its cleat, I did add one screw to the inside-bottom of cabinet to ensure no one inadvertently may ‘lift’ the cabinet off its cleat. This is rock solid secured to me wall above toilet for great extra storage in the kids’ bath! Overall, a good buy; but did expect it to be cheaper price considering MDF material and made in China. I look for country of origin now and try to buy from US friendly countries. Good luck, Mark in NY.
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Reviewed in the United States on April 1, 2024
★★★★★ 5
Very impressive
Color: Navy Blue, Size: 23x29
I've had a lot of experience with modern furniture that you have to put together. Most of it, I worry about the durability of the product. Most is put together with repurposed particle board. So it's heavy and I would think not durable - especially in a damp environment.
Saying that, I was very impressed with this product.
My experience with the product to this point has been the best of those type of products. It shipped very well...everything in place and neatly packed. The engineered wood (resembles plastic) seems solid, water resistant at a minimum, and scratch resistant. The instructions provided - while the product was easy to assemble - were amongst the clearest I've seen from such a product.
What impressed me the most was the thought behind the design of this product. The hinges are perfect for the product. The doors can be easily removed by pushing a button on the hinge. The holes on the boards were perfectly drilled - so much so that I didn't have to pound any board to put them together. The back wasn't nailed on and the slot used for the backing was spot on.
If I had to choose negatives (and I'm really nit-picking because this is really designed that well) it was that the shelf ends up being a bit loose and I would have liked the mounting board to match the width of the slot it was being used to fill. Both can be fixed at the house by home products and screws.
I was so impressed that I would go and buy another product from this manufacturer (and look for the manufacturer by name). IT is that good.
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Reviewed in the United States on December 4, 2022