ASME B18.2.2 Table 3 Hex Flat Nuts
ASME B18.2.2 Table 3 covers hex flat nuts, also known as slotted or plain flat nuts, with a very low profile. These nuts are primarily used in applications where minimal height is critical, such as in fastening into thin materials or where only a few threads are engaged.
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Product introduction
ASME B18.2.2 Table 3 covers hex flat nuts, also known as slotted or plain flat nuts, with a very low profile. These nuts are primarily used in applications where minimal height is critical, such as in fastening into thin materials or where only a few threads are engaged.
Common Specifications
| Materials | Carbon steel |
| Class | 5, 6, 8, 10,12 |
| Range | 1/4" - 2.1/2" |
| Thread | Coarse , Fine, Extra Fine, Special-Fine |
| Surface | Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Extremely low profile for minimal protrusion
- Conforms to ASME B18.2.2 Table 3 dimensions
- Often used in electrical and electronic applications
- Available in both inch coarse and fine threads
- Suitable for thin-wall assemblies
Application industry
- Electrical enclosures and panels
- Telecommunications equipment
- Light fixtures and appliances
- Thin metal assemblies
data table
| Size | 1-1/8" | 1-1/4" | 1-3/8" | 1-1/2" |
| UNC | 7 | 7 | 6 | 6 |
| AF Min (inch) | 1.631 | 1.812 | 1.994 | 2.175 |
| AF Max (inch) | 1.688 | 1.875 | 2.062 | 2.250 |
| AC Min (inch) | 1.859 | 2.066 | 2.273 | 2.480 |
| AC Max (inch) | 1.949 | 2.165 | 2.382 | 2.598 |
| T Min (inch) | 0.970 | 1.062 | 1.169 | 1.276 |
| T Max (inch) | 1.030 | 1.126 | 1.237 | 1.348 |
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