ASME B18.2.2 Table 12 Hex Flange Nuts
ASME B18.2.2 Table 12 specifies hex large flange nuts with inch threads, featuring an oversized flange that provides an exceptionally wide bearing surface. These nuts are designed for applications requiring maximum load distribution and reduced bearing pressure on soft or thin materials. The flange diameter is significantly larger than standard flange nuts.
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Product introduction
ASME B18.2.2 Table 12 specifies hex large flange nuts with inch threads, featuring an oversized flange that provides an exceptionally wide bearing surface. These nuts are designed for applications requiring maximum load distribution and reduced bearing pressure on soft or thin materials. The flange diameter is significantly larger than standard flange nuts.
Common Specifications
| Materials | Carbon steel |
| Class | A563 Grade A, C, DH |
| Range | 1/4″- 5/8″ |
| Thread | Coarse , Fine, Extra Fine, Special-Fine |
| Surface | Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Oversized flange for maximum bearing surface
- Significantly larger flange diameter than standard
- Reduces bearing pressure on soft materials
- Conforms to ASME B18.2.2 Table 12
- Inch thread series (UNC/UNF)
Application industry
- Sheet metal and thin-wall assemblies
- Plastic and composite material connections
- Automotive body panels
- Electrical enclosure mounting
data table
| Size | 6# | 8# | 10# | 12# | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 |
| UNC | 32 | 32 | 24 | 24 | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 |
| s Min (inch) | 0.302 | 0.334 | 0.365 | 0.428 | 0.428 | 0.489 | 0.551 | 0.675 | 0.736 | 0.861 | 0.922 | 1.088 |
| s Max (inch) | 0.312 | 0.344 | 0.375 | 0.438 | 0.438 | 0.500 | 0.562 | 0.688 | 0.750 | 0.875 | 0.938 | 1.125 |
| e Min (inch) | 0.342 | 0.381 | 0.416 | 0.488 | 0.488 | 0.557 | 0.628 | 0.768 | 0.840 | 0.982 | 1.051 | 1.240 |
| e Max (inch) | 0.361 | 0.397 | 0.433 | 0.505 | 0.505 | 0.577 | 0.650 | 0.794 | 0.866 | 1.010 | 1.083 | 1.299 |
| m Min (inch) | 0.156 | 0.187 | 0.203 | 0.222 | 0.222 | 0.268 | 0.330 | 0.375 | 0.437 | 0.483 | 0.545 | 0.627 |
| m Max (inch) | 0.171 | 0.203 | 0.219 | 0.236 | 0.236 | 0.283 | 0.347 | 0.395 | 0.458 | 0.506 | 0.569 | 0.675 |
| dc Min (inch) | 0.406 | 0.452 | 0.480 | 0.574 | 0.574 | 0.660 | 0.728 | 0.910 | 1.000 | 1.155 | 1.248 | 1.460 |
| dc Max (inch) | 0.422 | 0.469 | 0.500 | 0.594 | 0.594 | 0.680 | 0.750 | 0.937 | 1.031 | 1.188 | 1.281 | 1.500 |
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