$10.47 $0.21 per Count
Get Fast, Free Shipping with Amazon Prime FREE Returns
FREE delivery Thursday, May 23 on orders shipped by Amazon over $35. Order within 6 hrs 13 mins
In Stock
$$10.47 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$10.47
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon.com
Ships from
Amazon.com
Sold by
Amazon.com
Sold by
Amazon.com
Returns
30-day easy returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized

4.6 4.6 out of 5 stars 280 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Flat Washers by Hillman
$10.47 $0.21 per Count
Get Fast, Free Shipping with Amazon Prime
FREE Returns
3/8 Inch
{"desktop_buybox_group_1":[{"displayPrice":"$10.47","priceAmount":10.47,"currencySymbol":"$","integerValue":"10","decimalSeparator":".","fractionalValue":"47","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"GSq9jjkbkKyyS6CDw9IKiNmRv3mvNI%2Fct0CIJbODsjpvJSiXeojlH%2BUGYdfcBzZDp3yFFUDIGyNIx2xQtgB87ohAoJ7klviEXD9QBB49uBUz%2BCsiO%2B1brUDcJW7hWr0OZ%2Fgr9nkA1uGcwwZ7KXzUQQ%3D%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}]}

Purchase options and add-ons

Material Steel
Outside Diameter 0.75 Inches
Washer Type Square-Neck Bolt Lock
Exterior Finish Hot-Dipped Galvanized
Fastener Size 3/8"

About this item

  • Prevents rotation once installed
  • Conforms to ASTM A153
  • Made of high-strength steel
  • Mechanically galvanized finish
  • Quality Hillman fasteners
› See more product details

Frequently bought together

Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized
$10.47 ($0.21/Count)
Get it as soon as Thursday, May 23
In Stock
Ships from and sold by Amazon.com.
+
Steel Hex Nut, Hot-Dipped Galvanized Finish, Grade 2, ASME B18.2.2, 3/8"-16 Thread Size, 9/16" Width Across Flats, 21/64" Thi
$9.78 ($0.10/Count)
Get it as soon as Thursday, May 23
In Stock
Ships from and sold by Amazon.com.
+
Prime-Line 9080082 Flat Washers, USS, 3/8 In. X 1 In. OD, Hot Dip Galvanized Steel (50 Pack)
$8.40
Get it as soon as Thursday, May 23
In Stock
Ships from and sold by Amazon.com.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
Choose items to buy together.

From the manufacturer

Hillman Solutions is a leading North American provider of hardware products, including home improvement products, protective and job site gear solutions including gloves and storage, and robotic technologies encompassing key duplication and accessories, engraving and knife sharpening. Hillman designs innovative products and merchandising solutions for complex categories. Founded in 1964 in Cincinnati, Ohio, Hillman believes that the building never stops.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

Feedback

Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized

Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized

Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Fields with an asterisk * are required
/
/
/
/
Please sign in to provide feedback.

Product Description

Product Description

Anti-turn washers have serrations that extend radially inward and/or outward to bite into the bearing surface. This type of washer is effective as a lock washer when used with a soft substrate, such as aluminum or plastic. Variants all conform to ASTM A153.

From the Manufacturer

The anti-turn washer has serrations that extend radially inward and/or outward to bite into the bearing surface. This type of washer is effective as a lock washer when used with a soft substrate, such as aluminum or plastic.

Looking for specific info?

Compare with similar items

This Item
Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized
Hillman 290302 3/8-Inch Anti-Turn Washer, 50-Pack, Galvanized
Recommendations
The Hillman Group 41585 SAE Flat Washer, 3/8-Inch, 50-Pack
The Hillman Group 41585 SAE Flat Washer, 3/8-Inch, 50-Pack
dummy
Hard-to-Find Fastener 014973301194 Pronged Washers, 3/8, Piece-50
Hard-to-Find Fastener 014973301194 Pronged Washers, 3/8, Piece-50
dummy
Prime-Line 9080082 Flat Washers, USS, 3/8 In. X 1 In. OD, Hot Dip Galvanized Steel (50 Pack)
PRIME-LINE Prime-Line 9080082 Flat Washers, USS, 3/8 In. X 1 In. OD, Hot Dip Galvanized Steel (50 Pack)
dummy
Bolt Dropper 5/16" Stainless Flat Washer (100 Pack), 3/4" OD 18-8 (304) Stainless Steel, Suitable for Factories Repair, Kitchens, Shops, and Outdoor Construction by Bolt Dropper
Bolt Dropper 5/16" Stainless Flat Washer (100 Pack), 3/4" OD 18-8 (304) Stainless Steel, Suitable for Factories Repair, Kitchens, Shops, and Outdoor Construction by Bolt Dropper
dummy
Prime-Line 9082286 Medium Split Lock Washers, 3/8 In., Hot Dip Galvanized Steel (50 Pack)
PRIME-LINE Prime-Line 9082286 Medium Split Lock Washers, 3/8 In., Hot Dip Galvanized Steel (50 Pack)
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Price$10.47$3.69$15.99$8.40-12% $8.99
List: $10.18		$8.42
Delivery
Get it as soon as Thursday, May 23
Get it as soon as Thursday, May 23
Get it as soon as Thursday, May 23
Get it as soon as Thursday, May 23
Get it as soon as Thursday, May 23
Get it as soon as Thursday, May 23
Customer Ratings
4.64.6 out of 5 stars280
4.64.6 out of 5 stars91
4.84.8 out of 5 stars19
4.54.5 out of 5 stars102
4.74.7 out of 5 stars5,929
4.84.8 out of 5 stars8
Sold By
Amazon.com
Amazon.com
Amazon.com
Amazon.com
Bolt Dropper
Amazon.com
material
Steel
Zinc
Steel
Alloy Steel
Stainless Steel
Alloy Steel
washer type
Square-Neck Bolt Lock
Flat
Square
Flat
Flat
Split Lock
size
3/8 Inch
—
3/8"
3/8 in.
5/16" x 3/4"
3/8 in.
number of pieces
50
50
50
50
100
50
inside diameter
0.38 inches
0.38 inches
0.41 millimeters
0.41 inches
0.34 inches
0.39 inches
outside diameter
0.75 inches
0.75 inches
1.11 millimeters
0.81 inches
0.75 inches
0.68 inches
thickness
0.35 inches
0.35 inches
0.05 millimeters
0.05 inches
0.3125 inches inches
0.09 inches
fastener size
3/8"
3/8"
3/8"
3/8"
5/16"
3/8"
metal type
Aluminum, Alloy Steel
—
Carbon Steel
Alloy Steel
Stainless Steel
Alloy Steel
exterior finish
Hot-Dipped Galvanized
Ultra-Corrosion-Resistant
Zinc
Galvanized
Stainless Steel
Galvanized
weight
—
—
0.46 pounds
0.24 pounds
0.01 ounces
0.01 ounces

Customer reviews

4.6 out of 5 stars
4.6 out of 5
280 global ratings

Customers say

Customers like the sturdiness, versatility, fit, appearance and quality of the washers. For example, they mention that they're thick enough to last, work great to secure the bolt head in a wood use application, keep the carriage bolt from turning and that they fit perfectly on a spindle. That said, they appreciate the smart design and common sense engineering.

AI-generated from the text of customer reviews

19 customers mention19 positive0 negative

Customers are satisfied with the quality of the washer. They mention that it works great and is excellent for use with 5/16th carriage bolts in wood. Some say that the product has strong sharp prongs and works well with soft wood.

"Good product. Is what I needed." Read more

"Quality is good. Teeth bit into wood and give a professional look." Read more

"...works great with pinelumber and looks good too.I was very saticfied with this product." Read more

"Worked well...." Read more

6 customers mention6 positive0 negative

Customers like the versatility of the washers. They say it works great to secure the bolt head in a wood use application, and it prevents the carriage bolt from turning. The teeth grasp the wood and prevent rotation while securing the nut.

"...The teeth grasp the wood and prevent rotation while securing the nut...." Read more

"Yes ,they keep the carriage bolt from turning. Add some torque and they become cups. Made in china, only 0.049 thick, less than a standard washer." Read more

"This item works great to secure the bolt head in a wood use application." Read more

"...They work great for carriage bolts on a swing set I built." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the appearance of the washer. They mention it has a very smart design, looks good, and is common sense for carriage bolt applications. Some appreciate the good simple yet effective engineering.

"Quality is good. Teeth bit into wood and give a professional look." Read more

"...works great with pinelumber and looks good too.I was very saticfied with this product." Read more

"Cool product, now use on all my pressure treated deck projects...." Read more

"Common sense design for carriage bolt applications. I love good simple yet effective engineering that does not cost a fortune." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the fit of the washers. They mention that it is true to size and sturdy. Some say that it fits perfectly on a spindle for their purpose.

"Perfect fit for the 3/8" carriage bolt that I was using. The washers are of a sufficiently thick, high quality material." Read more

"...They fit perfectly on a spindle for the purpose. Only 1.3 mm thick, but maybe it can be doubled." Read more

"True to size and sturdy." Read more

"Fits the collar perfectly..." Read more

3 customers mention3 positive0 negative

Customers are satisfied with the sturdiness of the washers. They mention that they are thick enough to last and made of high quality material.

"...These are thick enough to last and galvanized. Great product." Read more

"...The washers are of a sufficiently thick, high quality material." Read more

"True to size and sturdy." Read more

3 customers mention3 positive0 negative

Customers appreciate the value of the washer.

"Product as described. Reasonably priced as opposed to purchasing from a large box store" Read more

"...I love good simple yet effective engineering that does not cost a fortune." Read more

"Great value..." Read more

Right on the Money
5 Stars
Right on the Money
In Construction sizes are a bit daunting. I measured the square part of my Closet Bolt, it was 5/16, I ordered 5/16 size and fit perfect. Fixed my plastic wheel barrow. I'd recommend using these BEFORE the Wheel Barrow cracks, cause they all do.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Richard G Green
5.0 out of 5 stars Fits 3/8 carriage bolts
Reviewed in the United States on July 6, 2023
Size: 3/8 InchVerified Purchase
Good product. Is what I needed.
Helpful
 Report
Amazon Customer
5.0 out of 5 stars What can you say ?
Reviewed in the United States on April 10, 2024
Size: 3/8 InchVerified Purchase
Its a washer thats holds a carriage bolt . They work . Ordered the 3/8” washers. They fit the 3/8” carriage bolts that was purchased some where else . And they pervented the head of the bolt from sinking way down in the wood . And still had very goid torque on them .
Helpful
 Report
Kevin
5.0 out of 5 stars Good
Reviewed in the United States on April 24, 2024
Size: 3/8 InchVerified Purchase
Quality is good. Teeth bit into wood and give a professional look.
Helpful
 Report
Dani & Joe
4.0 out of 5 stars work Great with soft wood.
Reviewed in the United States on August 7, 2022
Size: 1/4 InchVerified Purchase
Used it for both soft and hardwood. Had to hammer it flat Before tightening the bolt with hardwood; But, I used it for the design effect. works great with pinelumber and looks good too.

I was very saticfied with this product.
Helpful
 Report
~ƒ
5.0 out of 5 stars Right on the Money
Reviewed in the United States on December 6, 2023
Size: 5/16"Verified Purchase
In Construction sizes are a bit daunting. I measured the square part of my Closet Bolt, it was 5/16, I ordered 5/16 size and fit perfect. Fixed my plastic wheel barrow. I'd recommend using these BEFORE the Wheel Barrow cracks, cause they all do.
Customer image
~ƒ
5.0 out of 5 stars Right on the Money
Reviewed in the United States on December 6, 2023
In Construction sizes are a bit daunting. I measured the square part of my Closet Bolt, it was 5/16, I ordered 5/16 size and fit perfect. Fixed my plastic wheel barrow. I'd recommend using these BEFORE the Wheel Barrow cracks, cause they all do.
Images in this review
Customer image
Customer image
Helpful
 Report
Concade0910
5.0 out of 5 stars Good product
Reviewed in the United States on March 21, 2022
Size: 1/2"Verified Purchase
These washers are easy to use. The teeth grasp the wood and prevent rotation while securing the nut. I spray painted these, along with the lags, black for a more finished look to the deck.
Customer image
Concade0910
5.0 out of 5 stars Good product
Reviewed in the United States on March 21, 2022
These washers are easy to use. The teeth grasp the wood and prevent rotation while securing the nut. I spray painted these, along with the lags, black for a more finished look to the deck.
Images in this review
Customer image
Customer image
Helpful
 Report
Amazon Customer
3.0 out of 5 stars Tangs just fold over, do not drive into wood
Reviewed in the United States on November 6, 2020
Size: 3/8 InchVerified Purchase
Tangs are too thin to begin with, they do not drive into the wood. They just fold over.
Helpful
 Report
Mark W. Friesen
5.0 out of 5 stars They work.
Reviewed in the United States on June 2, 2023
Size: 3/8 InchVerified Purchase
Out of 4 smaller hardware stores and the 2 giant ones no one had any. Received them faster than expected which was GREAT!
Helpful
 Report

Top reviews from other countries

Michelle
5.0 out of 5 stars Works perfect with carriage bolts and couldn’t find anywhere else
Reviewed in Canada on December 14, 2023
Size: 1/2"Verified Purchase
Glad these were as described and worked well with the carriage bolts from Home Depot. The square under the head of the carriage bolt locks perfectly into place and these prevent the head from digging into the wood.
Report
maureen floyd
5.0 out of 5 stars As expected, fast shipping
Reviewed in Canada on April 30, 2022
Size: 5/16"Verified Purchase
‘Nuff said…
Report
Wesley McAllister
1.0 out of 5 stars Not the right size. Does not fit a 3/8 bolt.
Reviewed in Canada on November 27, 2021
Size: 3/8 InchVerified Purchase
Would need to be larger then .375. I have tried 5 washers and they are all the same size and do not fit the bolts.
Customer image
Wesley McAllister
1.0 out of 5 stars Not the right size. Does not fit a 3/8 bolt.
Reviewed in Canada on November 27, 2021
Would need to be larger then .375. I have tried 5 washers and they are all the same size and do not fit the bolts.
Images in this review
Customer image
Customer image
3 people found this helpful
 Report
Fasteddie
5.0 out of 5 stars First time usage.
Reviewed in Canada on September 4, 2020
Size: 1/4 InchVerified Purchase
Can't comment at this time, but it looks like a good product.
Report
potato
5.0 out of 5 stars These are awesome for any deck work
Reviewed in Canada on October 31, 2022
Size: 1/2"Verified Purchase
Thees are legit and a good product. Not sure why no local retailer sells them. They are a great piece of material to use when just need your build to be solid and keep from tearing out your wood..
Report