Best Black Oxide Hex Nuts in 2026
Daisy
Last Updated: Feb 8, 2026
Daisy
Last Updated: Feb 8, 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 | ✅ | ✅ | ✅ |
Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut
Grade 8 steel is stronger than grade 5 steel and often used in applications where strength is the primary consideration
Zinc yellow-chromate plating offers good corrosion resistance
Meets ASME B18.2.2 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Material: steel
Thread size: 1/4''-20
Height: 7/32 inch
Medium-Strength Steel Hex Nut, Grade 5, Zinc Plated, 1/4"-20" Thread Size (Pack of 100)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut
Grade 5 steel is often used in applications where strength is the primary consideration
Black oxide finish offers mild corrosion resistance and lubricity
Meets ASME B18.2.2 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut
Grade 8 steel is stronger than grade 5 steel and often used in applications where strength is the primary consideration
Plain surface has no finish or coating
Meets ASME B18.2.2 specifications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| RAParts Inc. | 9.81 | ❌ | ❌ | ❌ |
One New Aftermarket Replacement Self Locking Nut Size M18 x 1.50mm Din 985 Metric Fine
M18 x 1.5
Nylon Self-Locking Nut
Fine - Grade 5 - Plated
Replaces Part Number(s): 53842, OTK20-0328
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut
Grade 5 steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.2.2 specifications
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Small Parts | 5 |
| Reliable Aftermarket Parts Our Name Says It All | 1 |
We've carried out a comprehensive analysis of 134 reviews on hex nuts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select hex nuts priced around $10.34, with top brands including twcc, bolt dropper, hard-to-find fastener, fullerkreg, hillman, gelisen, small parts, mellewell and vigrue and binifimux
Our team of expert editors reviewed these high-quality items and handpicked the top 6 hex nuts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include winkkipag, jet fitting & supply, amazon.com, moofin, gelisen, mellewell direct and vigrue-king of screw and windfly .
We are dedicated to assisting our users in finding the right nuts Products based on their needs, saving them considerable time when choosing which hex nuts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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