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 | ✅ | ✅ | ✅ |
GALVANIZED STAINLESS STEEL: These lock and flat washers provide excellent protection and security for nuts and bolts. They are made with galvanized stainless steel for long-term use and outstanding durability.
VERSATILE & COMPATIBLE: These assorted washers come in multiple sizes to fit all your screws, nuts, and bolts. Each washer features a solid bearing surface to prevent the nut or bolt head from tearing through the material.
OPTIMAL SURFACE AREA: Each stainless-steel flat or lock washer easily deflects the screw or bolt load, spreading the weight evenly for a secure and sure fit. These washers for screws and bolts are ideal for use at home or in the workshop.
THE RIGHT SIZE: This set of washers contains a wide variety of sizes. It includes lock washers in sizes #6, #8, #10, 1/4", 5/16", and 3/8" and flat washers in sizes #6, #8, #10, 1/4", 5/16", and 3/8".
CONVENIENT STORAGE: Keep your washers ready for your next home or automotive project. This 350-piece set comes in a convenient, sturdy plastic box with divided compartments for easy storage and an inside lid display for easy organization.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| VIGRUE-KING OF SCREW | 9.93 | ✅ | ✅ | ✅ |
★Material: Made of alloy steel, good hardness, low temperature strength and corrosion resistant.
★Size: 9 Sizes of the most commonly used flat washers, M2 M2.5 M3 M4 M5 M6 M8 M10 M12.
★Quantity: It contains 9 sizes totally 684pcs, each size comes in a little poly bag organized in a little compartmentalized box. Perfect for having around the house and doing small projects.
★Functions: Flat washers are mainly used to reduce pressure and friction, prevent leakage, isolate, loosening or disperse pressure. Black Zinc Plated Alloy with rust resistant galvanized finish to ensure life-time use.
★Widely Application: Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| U-Turn Fasteners, Inc | 9.61 | ✅ | ✅ | ✅ |
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Mallxiugull | 9.89 | ✅ | ✅ | ✅ |
Quality Material: these self locking washers are made of low carbon steel and galvanized coating, which feature good insulation performance, strong bearing capacity, strong durability, and are not easy to rust or age
Sufficient Quantity: there are 500 pieces of galvanized steel self locking washers, suitable for large scale work, which can meet your needs at one time, and can also share with those in need
Size Details: locking washers measure about 1.5 inch/ 3.8 cm in diameter, 0.1 inch in center hole diameter, suitable for 12 ga pins
Easy to Install: stick/screw/nail the bottom of the insulation nails to the ceiling or wall, then pierce the insulation board into the insulation nails, push the self locking washers to the insulation nails, it is recommended that you distribute the insulation nails evenly, it can be very good stable items
Wide Application: these flat washers can be widely applied in machinery equipment, industrial production of shock absorption and insulation, bringing much convenience
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| ❌ | ❌ | ❌ |
Absolutely Superior Quantity: the package comes with 150 zinc-plated plaster washers(screw not included), which measure approx. 1 inches in diameter, ample quantity to meet your daily use needs, or as a backup in case of emergency.
Quality Material: our plaster repair rings are made of steel with galvanized surface, reliable and sturdy, not easy to deform and rust, can serve with confidence for a long time.
Ideal for Fastener Hardware: the middle of the plaster buttons is pre-drilled for the installation of screws, and the back of the plaster buttons is convex for insertion into the surface of the back plate to play a fixed role.
Easy to Store: the metal washers for screws are in small size and lightweight, which can be easily stored in your tool box, occupying a little space, it's also very convenient to take out.
Widely-Use: these drywall repair rings washers are ideal fastener kits for fixing and installing backing boards, foam boards or drywall repair, ceiling plaster repair, Including residential renovation, schools, hotels, apartments and other infrastructure, saving time and effort.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Worldtrend | 9.87 | ✅ | ✅ | ✅ |
20 Pcs Square Washers Plate, Material: Carbon steel Q345 , surface hot-dip galvanized (good impact resistance, wear resistance, corrosion resistance).
Length: 1⅝ inches (40 mm), Width: 1⅝ inches (40 mm) ,Thickness: 2.8mm
Hole Diameter : ⅝ inches(Φ16.8mm )
Square Washers Plate used in light steel frame housing fittings, construction sites, machinery and industrial equipment and other related scenes, and their applications in many areas
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| sensiprane | 9.24 | ✅ | ✅ | ✅ |
Perforated Insulation Pins: Used to support rigid board and batt type insulation on wall and ceiling applications. Perforated Insulation Hangers are also great for installing fiberglass board panels onto ceilings.
Quality Material: Made of low carbon steel, with galvanized coating and good insulation performance, the insulation dome cap washers are made of aluminum, which can be well matched with work.
Easy to Use: Simply glue/screw/nail the base of the insulation fasteners to the ceiling, pierce the fiberglass panel onto the pins (1 pin on each corner minimum) and push the washer onto the pin to hold the panel in place. Snip off the remaining part of the pin if necessary.
What You Get: 50 insulation pins, 50 self locking washers round and 50 insulation dome cap washers, sufficient quantity and various styles can meet your daily needs and replacements.
Widely Used: our insulation pins and washers are mainly applied in anchoring aspects of wall insulation house, HVAC system air duct insulation and thermal insulation. If you have any questions, please reach out to us, thank you!
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Dunzy | 1 |
| Gbgs | 1 |
| Gekmor | 1 |
| Holymaji | 1 |
| Neiko | 1 |
| U-Turn Fasteners, Inc. | 1 |
| Vigrue | 1 |
We've carried out a comprehensive analysis of 2,996 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 $18.13, 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 7 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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