Best M12 Flat Washers in 2026
Daisy
Last Updated: Jul 17, 2026
Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Grade 8 steel is stronger than grade 5 steel and often used in applications where strength is the primary concern
Zinc yellow-chromate plating offers good corrosion resistance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| LUPANTER HARDWARE STORE | 9.77 | ✅ | ✅ | ✅ |
【Size】--inner diameter 0.464-0.484inch, outside diameter 0.915-0.937 inch, thickness 0.051-0.080
【Made of Stainless】 --- Completely and infinitely recyclable, stainless steel is the “green material” par excellence. good corrosion resistance, extremely hygienic, easy to maintain, highly durable and offers a wide variety of aspects.
【Widely Applications】 --- Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.
【USA Standard】 ---The size and performance according to the American standard ANSI/ASME B18.22.1(SAE)., suitable for the SAE size screw and nuts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| LUPANTER HARDWARE STORE | 9.77 | ✅ | ✅ | ✅ |
【Size】--inner diameter 0.276-0.296 inch, outside diameter 0.620-0.640 inch, thickness 0.051-0.080
【Made of Stainless】 --- Completely and infinitely recyclable, stainless steel is the “green material” par excellence. good corrosion resistance, extremely hygienic, easy to maintain, highly durable and offers a wide variety of aspects.
【Widely Applications】 --- Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.
【Reasonable Package】 --- Each type of the washer been packaged individually by small poly bag .You can easily take any type you want.
【USA Standard】 ---The size and performance according to the American standard ANSI/ASME B18.22.1(SAE)., suitable for the SAE size screw and nuts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Black oxide finish offers mild corrosion resistance and lubricity
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Plain surface has no finish
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Black oxide finish offers mild corrosion resistance and lubricity
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Flat washer provides a bearing surface for fastener load distribution or acts as a spacer
Grade 8 steel is stronger than grade 5 steel and often used in applications where strength is the primary concern
Zinc yellow-chromate plating offers good corrosion resistance
Meets ASME B18.22.1 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Allied Titanium | 8.43 | ❌ | ❌ | ❌ |
#10 Allied Titanium Flat Washer 0.050 Thick X 7/16 Inch Outside Diameter
TRUE TITANIUM(TM) - Stronger, Lighter and Corrosion Free
Titanium is good for use in or near saltwater
General Tolerance: +0/-0.003 inch
Meets ASME B18.22.1; Grade 5 (Ti-6Al-4V) Titanium with Polished Finish
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Newport Fasteners | 7.82 | ❌ | ❌ | ❌ |
Flat Washers USS
Manufactured from ASME B18.21.1 specifications
Steel Zinc Plated
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Small Parts | 9 |
| Lupanter | 2 |
| Allied Titanium | 1 |
| Newport Fasteners | 1 |
We've carried out a comprehensive analysis of 2,905 reviews on flat washers, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select flat washers priced around $24.19, with top brands including wensilon, ylyl, hardlad, lupanter, kindroufly and marine bolt supply and small parts
Our team of expert editors reviewed these high-quality items and handpicked the top 13 flat washers for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include wensilong, ylyl direct, faiq ahmed, lupanter hardware store, kindroufly and marine bolt supply and amazon.com .
We are dedicated to assisting our users in finding the right washers Products based on their needs, saving them considerable time when choosing which flat washers to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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