SKU: 34890138581

Hillman Yellow Dichromate Steel 5/16 in. USS Flat Washer, 100-Pack

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Description

Hillman Yellow Dichromate Steel 5/16 in. USS Flat Washer, 100-PackHillman 5 16 in. USS Flat Washer (Yellow Dichromate), 100 Pack Durable yellow dichromate steel flat washers sized for 5 16 inch USS bolts distribute load and protect materials from damage. Ideal for enhancing fastener security and reducing wear in wood, metal, and general construction applications. Key Features: Corrosion Resistant Finish: Yellow dichromate steel helps resist rust and wear USS Compatibility: Sized for use with 5 16 inch USS threaded

Hillman 5/16 in. USS Flat Washer (Yellow Dichromate), 100-Pack

Durable yellow dichromate steel flat washers sized for 5/16-inch USS bolts distribute load and protect materials from damage. Ideal for enhancing fastener security and reducing wear in wood, metal, and general construction applications.

Key Features:

  • Corrosion-Resistant Finish: Yellow dichromate steel helps resist rust and wear
  • USS Compatibility: Sized for use with 5/16-inch USS threaded bolts
  • Load Distribution: Flat design spreads pressure to prevent material damage
  • Multi-Material Use: Suitable for wood, metal, and general fastening projects
  • Bulk Convenience: 100-pack for jobs requiring consistent hardware

Specifications Table:

Specification Details
Material Steel
Finish Yellow dichromate
Washer Type USS flat washer
Size 5/16 in (for use with 5/16 in bolt or screw)
Package Quantity 100 pieces

Frequently Asked Questions (FAQ):

Q: What bolt size do these washers fit?
A: They are designed for use with 5/16-inch USS bolts or screws.

Q: What is the finish on these washers?
A: They have a yellow dichromate finish on steel for improved corrosion resistance.

Q: Can these be used with other finishes?
A: For best results, match washer finish to your existing fasteners to avoid potential galvanic reactions.

Q: Where are flat washers typically used?
A: Use them to distribute load, prevent fastener heads from embedding into material, and enhance joint security.

Q: How many washers are included?
A: 100 washers per retail package.

A Polished Industrial Touch for Seamless Fastening

The yellow dichromate sheen brings a refined industrial note to utility, elevating everyday hardware into a purposeful accent. Its clean, flat profile offers a tidy finish while protecting surfaces, perfect for cabinetry or exposed shelving details. Pair with matching fasteners for a cohesive, professional look across fixtures and custom builds. This is the quiet essential that ensures your spaces feel both intentional and enduring.

Equip your project with reliable, corrosion-resistant fastening—add this 100-pack of Hillman 5/16 in. USS 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: 34890138581

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4.1 ★★★★★
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Verified Purchase
Gio Garcia
West Palm Beach, US
★★★★★ 5
Good Replacement Set
Style: 19 Pack
Good replacement set for the price. Parts are basically like the originals and are easily installed for a perfect fit for the 25C.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 11, 2025
D
Verified Purchase
dacker
Grantham, US
★★★★★ 5
Rejuvenates your Robovac, but one caution
I was a little wary buying third-party aftermarket parts for my Eufy Robovac 30c, however, all the parts in this kit are virtually identical to OEM parts. I replaced all three brushes and all three filters and let it loose on my Golden Retriever-inhabited living room. I can honestly say the result was a 50% increase in the amount of fur collected. I suspect that over time there is a loss of performance so gradual that it's easy to not notice. I assume the new filters returned the vacuum power to it's original level of suction was a big factor. When I was browsing through all the available choices here on Amazon, a plastic "ring" kept appearing in many of the product images, however, people did not know what it is for or simply did not get one in their shipment. If you look at the photos I've attached one can see that I did indeed get one and figured out its purpose, to remove fur and/or hair from the horizontal brush. The bottom line is that I would definitely buy this item again. =========== EDIT, four weeks later: Since replacing the main roller brush with the one included with this product, I have experienced several “Roller brush is stuck” shutdowns and alerts. In each case, there has been nothing tangled in the brush and the brush was free to spin. I have to say it’s quite annoying to come home expecting the floor to be cleaned but only to find this error long before the job was finished. Today it gave this error twice in one cleaning cycle. I never experienced this problem with the OEM roller brush.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 8, 2019
S
Verified Purchase
SFriedman
Port Orchard, US
★★★★★ 5
Euphy works good as new!
Style: 19 Pack
As soon as I opened the package everything looked the same- pre-filters, filters, main brush, and side brushes. I changed the big brush first;the only issue was the new brush body didn't have the white arrows to help aligning but that didn't affect how the brush worked. I changed filter and pre-filter, and finally the side brushes. When I turned on my "Goophy" and tried to let her run the side brushes were a little too (Goophy's side brushes sounded a little louder). I trimmed the side brushes a little and all was well. Goophy didn't want to run herself but it didn't take long for me to figure out it wasn't the new brushes ;just the operator pushing the wrong button. My Goophy Euphy did what she was supposed to do- vacuum the carpet and tile floor. Goophy Euphy still wanted to take the long way to her charging station which was nothing new and easily corrected. Over all the new brushes and filter restored Goophy Euphy back to when we first used her!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 22, 2023
T
Verified Purchase
Turtle Block
Bozeman, US
★★★★★ 4
Don't be cheap like me - buy these and save yourself the hassle!
Style: 19 Pack
I made the mistake of going with another, slightly cheaper set of replacement parts for our Eufy RoboVac 11S. I did not heed the cautionary tales which lead me having to find replacement parts for the replacement parts. This brand fits our vacuum perfectly - the corner brushes don't pop off, the filter is the right size and the roller brush gets sufficiently tangled with cat hair so clearly also a good fit. My only concern (and why I only gave four stars) is - surprise! - the corner brushes. Do they stay on? YES! In fact, they is so secure, I had difficulty swapping one out. Here's the peculiarity of the brand - the "whiskers" on the spinner fell out. I found them all over the floor, on different surface types and under various conditions; they were not getting caught on any one thing. Not all at once, but over two or three uses, one of the corner brushes had become devoid of almost two entire spokes! Ironically, the little guy can't seem to pick up his own mess but I digress. Without the whiskers to grasp, removing the part was difficult. I ended up using a small flathead screwdriver for leverage to pop it off. While the other corner brush appeared to have shed some whiskers as well, it was not in need of replacement. Despite the shedding, this will be my first go-to for replacement parts next go round.
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Reviewed in the United States on September 24, 2022
A
Verified Purchase
Afework
Lowell, US
★★★★★ 5
Nothing.
Style: 19 Pack
It’s as shown & working properly for now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 1, 2026

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