Property Class 8.8 Steel Low and High Cap (Acorn) Nuts, Inch are supplied to SAE J483. The grade provides requires plating (zinc) for corrosion protection and is magnetic; the practical service range is commonly limited to approx. +300 °C; confirm against the coating and the load. Property data, grade comparison and the full size table follow.
Why Choose Property Class 8.8 Steel for Low and High Cap (Acorn) Nuts, Inch
The workhorse medium-carbon alloy class for structural joints. For low and high cap (acorn) nuts, inch, this matters when requires plating (zinc) for corrosion protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 8.8 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
| Corrosion characteristic | Requires plating (zinc) for corrosion protection |
Corrosion Behavior in Service
Carbon and alloy steel low and high cap (acorn) nuts, inch require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Galvanic & Galling Considerations
For low and high cap (acorn) nuts, inch in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Sizes of Low and High Cap (Acorn) Nuts, Inch Available in Property Class 8.8 Steel
| Size | Type | Threads per inch | Width across flats s (in) | A (in) | Nut height m (in) | Q (in) | U (in) | Reference standard |
|---|---|---|---|---|---|---|---|---|
| #6 | Low cap nuts | 32 | 0.312 | 0.3 | 0.34 | 0.16 | 0.16 | SAE J483 |
| #8 | Low cap nuts | 32 | 0.312 | 0.3 | 0.34 | 0.16 | 0.16 | SAE J483 |
| #10 | Low cap nuts | 24 | 0.375 | 0.36 | 0.41 | 0.19 | 0.19 | SAE J483 |
| #12 | Low cap nuts | 24 | 0.375 | 0.36 | 0.41 | 0.19 | 0.22 | SAE J483 |
| 1/4" | Low cap nuts | 20 | 0.438 | 0.41 | 0.47 | 0.22 | 0.25 | SAE J483 |
| 5/16" | Low cap nuts | 18 | 0.5 | 0.47 | 0.53 | 0.25 | 0.31 | SAE J483 |
| 3/8" | Low cap nuts | 16 | 0.562 | 0.53 | 0.62 | 0.28 | 0.38 | SAE J483 |
| 7/16" | Low cap nuts | 14 | 0.625 | 0.59 | 0.69 | 0.31 | 0.44 | SAE J483 |
| 1/2" | Low cap nuts | 13 | 0.75 | 0.72 | 0.81 | 0.38 | 0.5 | SAE J483 |
| 9/16" | Low cap nuts | 12 | 0.875 | 0.84 | 0.94 | 0.44 | 0.56 | SAE J483 |
| 5/8" | Low cap nuts | 11 | 0.938 | 0.91 | 1 | 0.47 | 0.62 | SAE J483 |
| 3/4" | Low cap nuts | 10 | 1.062 | 1.03 | 1.16 | 0.53 | 0.75 | SAE J483 |
| 7/8" | Low cap nuts | 9 | 1.25 | 1.22 | 1.36 | 0.62 | 0.88 | SAE J483 |
| 1" | Low cap nuts | 8 | 1.438 | 1.41 | 1.55 | 0.72 | 1 | SAE J483 |
| 1 1/8" | Low cap nuts | 7 | 1.625 | 1.59 | 1.75 | 0.81 | 1.12 | SAE J483 |
| 1 1/4" | Low cap nuts | 7 | 1.812 | 1.78 | 1.95 | 0.91 | 1.25 | SAE J483 |
| #6 | High cap nuts | 32 | 0.312 | 0.3 | 0.42 | 0.17 | 0.19 | SAE J483 |
| #8 | High cap nuts | 32 | 0.312 | 0.3 | 0.42 | 0.17 | 0.19 | SAE J483 |
| #10 | High cap nuts | 24 | 0.375 | 0.36 | 0.52 | 0.2 | 0.25 | SAE J483 |
| #12 | High cap nuts | 24 | 0.375 | 0.36 | 0.52 | 0.2 | 0.28 | SAE J483 |
| 1/4" | High cap nuts | 20 | 0.438 | 0.41 | 0.59 | 0.23 | 0.31 | SAE J483 |
| 5/16" | High cap nuts | 18 | 0.5 | 0.47 | 0.69 | 0.28 | 0.38 | SAE J483 |
| 3/8" | High cap nuts | 16 | 0.562 | 0.53 | 0.78 | 0.31 | 0.47 | SAE J483 |
| 7/16" | High cap nuts | 14 | 0.625 | 0.59 | 0.88 | 0.34 | 0.53 | SAE J483 |
| 1/2" | High cap nuts | 13 | 0.75 | 0.72 | 1.03 | 0.42 | 0.62 | SAE J483 |
| 9/16" | High cap nuts | 12 | 0.875 | 0.84 | 1.19 | 0.48 | 0.69 | SAE J483 |
| 5/8" | High cap nuts | 11 | 0.938 | 0.91 | 1.28 | 0.53 | 0.78 | SAE J483 |
| 3/4" | High cap nuts | 10 | 1.062 | 1.03 | 1.45 | 0.59 | 0.94 | SAE J483 |
| 7/8" | High cap nuts | 9 | 1.25 | 1.22 | 1.72 | 0.7 | 1.09 | SAE J483 |
| 1" | High cap nuts | 8 | 1.438 | 1.41 | 1.97 | 0.81 | 1.25 | SAE J483 |
Dimensions are independent of the material: every size above is available in Property Class 8.8 Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
Grade 8 8 Steel is one of the grades the catalog describes. Locking method is specifiable independently of the rest: nylon insert, all-metal deformed thread, serrated flange, or none. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
