Best M4 Lock 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 |
|---|---|---|---|---|
| HELIFOUNER | 9.89 | ✅ | ✅ | ✅ |
【Sizes】M2 M2.5 M3 M4 M5 M6 M8 M10 M12, total 900 pieces/9 sizes of the most commonly used black zinc washers, flat washers, metal washers in a plastic case, different size can satisfy your different needs.
【Design】Flat washers, metric washers, metal washers are designed for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.
【Material】Black zinc plated steel, which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.
【Package Included】900 pieces 9 sizes in total, package in a durable transparent box with label. It is easy to distinguish the size of the product, you can choose the suitable one to meet all your needs.
【Wide Applications】Highly compatible with screws, nuts and bolts of same sizes and feature solid bearing surface to prevent nut/bolt head from tearing through material. Designed to spread the load of a screwed fastening and prevent loosening in industrial, shop, decks and fence building, automotive and home appliances.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Lock Washers ensure a tight assembly
Plain Steel fasteners are suitable where strength and value are the primary considerations
Size Name corresponds to matching screw or bolt size
Country of origin: China
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Nord-Lock | 6.74 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made specifically for use with M8 steel bolts. The serrated washers are also compatible with 5/16 inch bolts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock Carbon Steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock multifunctional wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| powersportparts2u | 9.54 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with M10 steel bolts and/or nuts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Nord-Lock | 6.74 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with 3/8 inch steel bolts and/or nuts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Clipsandfasteners Inc | 9.89 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with M6 steel bolts and/or nuts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BUSY-CORNER | 9.91 | ✅ | ✅ | ✅ |
【WIDE APPLICATION】Split lock zinc washers prefect use for around the house and yard decorations, electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.
【DETAILED SIZE】Spring lock washers set includes 6 most used sizes, M3=250PCS, M4=250PCS, M5=150PCS, M6=100PCS, M8=25PCS, M10=25PCS.
【HIGH QUALITY】Split lock washer made from zinc.
【HANDY PACKING】800pcs washers in a clear plastic case, makes it easy to find correct size quickly, saves your time of running around looking for a particular size washer.
【CUSTOMER SERVICE】You are unsatisfied for any reason, return your goods with no questions asked and BUSY-CORNER STORE will provide a full refund.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Clipsandfasteners Inc | 9.89 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with 1/4 inch steel bolts and/or nuts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Nord-Lock | 6.68 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with M12 steel bolts and/or nuts.
Each pack contains 10 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Clipsandfasteners Inc | 9.89 | ✅ | ✅ | ✅ |
Nord-Lock wedge-locking washers are made for use with M5 steel bolts and/or nuts. The serrated washers are also compatible with #10 bolts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Clipsandfasteners Inc | 9.89 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with 1/2 inch steel bolts and/or nuts.
Each pack contains eight glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Clipsandfasteners Inc | 9.89 | ❌ | ❌ | ❌ |
Nord-Lock wedge-locking washers are made for use with M8 steel bolts and/or nuts. The serrated washers are also compatible with 5/16 inch bolts.
Each pack contains 20 glued pairs of washers.
Applications for Nord-Lock steel washers include general steel applications.
Nord-Lock washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. Nord-Lock steel washers promise the highest corrosion resistance on the market.
Nord-Lock wedge-locking washers are used in industries such as: energy, robotics, medical, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Nord-Lock | 9 |
| Busy-Corner | 1 |
| Helifouner | 1 |
| Small Parts | 1 |
We've carried out a comprehensive analysis of 667 reviews on lock washers, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select lock washers priced around $15.11, with top brands including wensilon, hilitchi, helifouner, qteatak, busy-corner, persberg and pzrt and the hillman group
Our team of expert editors reviewed these high-quality items and handpicked the top 12 lock washers for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include wensilong, hilitchi, helifouner, jianfeng store, busy-corner and pzrt 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 lock 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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