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 | ✅ | ✅ | ✅ |
Machine screw hex nut has a flat top with a large bearing surface and chamfered corners
Steel is often used in applications where strength is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
Meets ASME B18.6.3 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
316 stainless steel provides strength and better corrosion resistance than 18-8 stainless steel
Plain surface has no finish or coating
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 2 steel is often used in applications where toughness is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
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
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 |
|---|---|---|---|---|
| ❌ | ❌ | ❌ |
Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut
18-8 stainless steel provides good corrosion resistance and strength
Black oxide finish offers mild corrosion resistance and lubricity
Meets DIN 934 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
Class 10 steel is often used in applications where strength is the primary consideration
Zinc yellow-chromate plating offers good corrosion resistance
Meets DIN 934 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
Class 10 steel is often used in applications where strength is the primary consideration
Zinc yellow-chromate plating offers good corrosion resistance
Meets DIN 934 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 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 |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Heavy hex nut is taller and wider than standard hex nut for a stronger hold and better security
Grade 2 steel is often used in applications where toughness is the primary consideration
Zinc plating resists corrosion and has a reflective appearance
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 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
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Firecat | 9.04 | ✅ | ✅ | ✅ |
[DIMENSIONS] Type: serrated flange nuts; Standard: ANSIB18.2.2; Material: 18-8 (A2, 304) Stainless Steel; Dimensions: #8-32; Quantity: 50 pcs.
[MATERIAL] 100% Made of high quality 304 stainless steel (also known as 18-8 or A2 stainless steel), they have good corrosion resistance, rust resistance and high hardness, which provides a longer service life, can be used indoor and outdoor, even in humid environment.
[FEATURE] Flange works like a washer to distribute the load. Serrations can help grip the material surface and prevent the nuts from loosening due to vibration.
[APPLICATION] Easy installation for mild vibration environment. Can be used in machinery, electrical appliances, automobile, shipbuilding and etc.
[NOTE] Small parts included, please keep away from children and pets.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Small Parts | 12 |
| Stormcube | 1 |
We've carried out a comprehensive analysis of 591 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 $10.83, 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 13 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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