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 |
|---|---|---|---|---|
| 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
18-8 stainless steel provides good corrosion resistance and strength
Plain surface has no finish
Meets ANSI 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
Nylon 6/6 provides resistance to abrasion, corrosion, and many chemicals, is nonconductive, and is a strong yet lightweight plastic
| 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
18-8 stainless steel provides good corrosion resistance and strength
Plain surface has no finish
Country of origin: China
| 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
Zinc plating resists corrosion and has a reflective appearance
Meets DIN 125 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 DIN 125 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 |
|---|---|---|---|---|
| FSATNDE | 7.55 | ✅ | ✅ | ✅ |
Set Includes 8 most used sizes:M4 M5 M6 M8 N10 M12 M14 M16,can meet different using needs,good for your fixing or projects working.
Wedge locking washers are generally installed under the nut to prevent the nut from loosening.
Widely used in electrical connections on household and commercial appliances.
High quality 65Mn,good corrosion resistance.
All the small parts are packed in a transparent plastic box with compartments,which is convenient to carry,store or reuse as a backup kit.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Small Parts | 14 |
| Fasttend | 1 |
We've carried out a comprehensive analysis of 3,046 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 $7.37, 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 15 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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