Hillman Hot Dipped Galvanized Steel 5/16 in. USS Flat Washer, 100-Pack
SKU: 43390678645

Hillman Hot Dipped Galvanized Steel 5/16 in. USS Flat Washer, 100-Pack

Sale price$12.59 Regular price$13.99
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Description

Hillman Hot Dipped Galvanized Steel 5/16 in. USS Flat Washer, 100-Pack5 16 in. Hot Dip Galvanized USS Flat Washers (100 Pack) These Hillman USS flat washers add load distribution and prevent fasteners from biting into wood or metal. Made of steel with a hot dipped galvanized finish, they deliver reliable corrosion resistance for outdoor and marine projects. Key Features: Corrosion Protection: Hot dipped galvanized steel resists rust in outdoor and marine environments Load Distribution: Flat washer design spreads force

5/16 in. Hot-Dip Galvanized USS Flat Washers (100-Pack)

These Hillman USS flat washers add load distribution and prevent fasteners from biting into wood or metal. Made of steel with a hot-dipped galvanized finish, they deliver reliable corrosion resistance for outdoor and marine projects.


Key Features:

  • Corrosion Protection: Hot-dipped galvanized steel resists rust in outdoor and marine environments
  • Load Distribution: Flat washer design spreads force to protect surfaces and strengthen joints
  • USS Compatibility: Sized for coarse-thread 5/16 in. bolts and screws
  • Bulk Value: 100-pack for jobsite efficiency and replenishment
  • Durable Construction: Steel build maintains clamping force under heavy use

Specifications Table:

Specification Details
Material Steel
Finish Hot Dipped Galvanized
Washer Type Flat
Standard USS (coarse thread compatibility)
Size 5/16 inch
Number in Package 100 pack
Packaging Type Boxed
Inch/Metric Inch

Frequently Asked Questions (FAQ):

Q: What bolt size are these washers for?
A: They are designed for use with 5/16 in. coarse-thread (USS) bolts and screws.


Q: Can these be used outdoors?
A: Yes. The hot-dipped galvanized finish provides strong corrosion resistance suitable for outdoor applications.


Q: Are these metric or inch sized?
A: Inch sized (USS standard).


Q: What is included in the package?
A: A boxed 100-pack of 5/16 in. USS flat washers.


Q: Do these work with fine-thread hardware?
A: They are intended for USS coarse-thread bolts; match washers to the hardware standard you’re using for best results.


Industrial Strength, Effortless Finish

The galvanic sheen of these flat washers brings a refined, utilitarian beauty to exposed hardware moments. Their hot-dipped finish offers a rugged texture that complements raw woods and weathered metals. Style them with blackened bolts on cedar or concrete for a crisp, architectural detail. A small component with big impact—essential for enduring, luxe outdoor installations.


Equip your project with corrosion-resistant confidence—add this 100-pack of Hillman 5/16 in. galvanized flat washers 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: 43390678645

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4.6 ★★★★★
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A
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Amber Teele
Lexington, US
★★★★★ 5
Best pillow I've ever had
Size: Queen (Pack of 1)
I don't really write reviews but holy buckets, Batman. This pillow is legit. Back, neck, and shoulder pain is nothing new for me; I've had scoliosis since I was a kid and hyperflexibility in my neck since birth leading to frequent muscle spasms that have caused me to miss work. Guys. This pillow. It is the most comfortable pillow I've ever had. Like, my neck doesn't hurt and I genuinely didn't remember what that felt like. It's simultaneously supportive and soft and it doesn't sink in. The instructions are super clear to understand and the pillow fluffs up no problem if it gets a little flat. This is a game changer for me and I so hope anyone who buys this has the same experience.
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Reviewed in the United States on June 6, 2026
D
Verified Purchase
Dana K.
Waukegan, US
★★★★★ 5
I highly recommend this pillow, it’s great for someone with neck or back problems.
Size: Queen (Pack of 1), Size: Queen (Pack of 1)
I absolutely love this pillow! When it says it’s adjustable it definitely means that. When you first get it, it’s hard to believe that it’s going to be anything but put it in the dryer for a few minutes and it becomes so large. You will definitely have to remove some of the stuffing unless you like a really large fluffy pillow. The stuffing is high-quality and once it has been put into the dryer it becomes a fibrous type material that can be fluffed over and over and go back to the same size. It seems to be a high-quality cover on the outer portion and is thick and has a slight cooling affect. It has a separate cover on the inner portion covering the foam stuffing. I ordered this because I have neck problems and it has been super comfortable for me because I’m able to adjust it multiple times depending on my needs for the particular night when I lay down. Having the extra stuffing means that if the pillow does happen to go flat I can always add the extra that I took out when I received it. It did have a slight odor when it first came, but after putting it in the dryer, it went away immediately. I do think that’s only due to the plastic that it’s shipped in not anything with the pillow. I think this pillow is well worth it price and I would highly recommend it for anyone that is a side or back sleeper or has any type of neck problems.
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Reviewed in the United States on February 3, 2026
C
Verified Purchase
Caitlyn
West Palm Beach, US
★★★★★ 5
Amazing!
Size: King (Pack of 1)
Such a great pillow I’m buying another one! You can add or subtract stuffing to your liking. It’s really nice quality, quilted and soft. Best pillow ever. Super comfy and great sleep. Pretty firm with all the stuffing. Perfect the way it came with stuffing on the side. My husband loves it and now I want one.
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Reviewed in the United States on May 15, 2026
A
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Alli
Houston, US
★★★★★ 5
Totally worth the money
Size: King (Pack of 1), Size: King (Pack of 1)
Right off the bat, the packaging is absolutely adorable and felt like I was buying a premium product. I love that this pillow is adjustable and as a side sleeper, I needed a pillow that is both firm and supportive of my neck. This hits all the boxes. We will be buying more of these for our bed!
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Reviewed in the United States on June 1, 2026
F
Verified Purchase
Fashionista21
Bozeman, US
★★★★★ 5
Excellent pillow
Size: King Size Pack of 1, Color: White
This is a great pillow!! I ordered this for my elderly mother who wanted a softer pillow. She absolutely loves this one. It’s supportive, keeps her cool also keeps its shape. I love that it came with extra stuffing so you can customize it. Well worth the price!!
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Reviewed in the United States on May 31, 2026

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