| Grade of Bolt | Surface Finish | Nominal Size Inches | A563 Grade and ANSI Nut Style | |||
|---|---|---|---|---|---|---|
| Recommended | Suitable | |||||
| Hex | Heavy Hex | Hex | Heavy Hex | |||
| Any | 1⁄4 to 11⁄2 | A | B,D,DH | A,B,C,D,DH,DH3 | ||
| >11⁄2 to 2 | A | A | C,D,DH,DH3 | |||
| >2 to 4 | A | C,D,DH,DH3 | ||||
| Any | 1⁄4 to 11⁄2 | A | B,D,DH | A,B,C,D,DH,DH3 | ||
| >11⁄2 to 2 | A | A | ||||
| >2 to 4 | A | |||||
| Plain | 1⁄2 – 11⁄2 | C | C3,D,DH,DH3 | |||
| Galvanized | 1⁄2 – 11⁄2 | DH | ||||
| Plain | 1⁄2 – 11⁄2 | C3 | DH3 | |||
| Plain | 1⁄4 to 11⁄2 | C | D,DH | C3,D,DH,DH3 | ||
| >11⁄2 to 4 | C | C3,D,DH,DH3 | ||||
| Galvanized | 1⁄4 to 11⁄2 | DH | ||||
| >11⁄2 to 4 | DH | |||||
| Plain | 1⁄4 to 11⁄2 | DH | DH | D,DH,DH3 | ||
| >11⁄2 to 4 | DH | DH3 | ||||
| Plain | 1⁄4 to 11⁄2 | B | D,DH | B,C,C3,D,DH,DH3 | ||
| >11⁄2 to 3 | A | C,C3,D,DH,DH3 | ||||
| Galvanized | 1⁄4 to 11⁄2 | DH | D,DH | D | ||
| >11⁄2 to 3 | DH | D | ||||
| Plain | 1⁄2 – 11⁄2 | DH | DH3 | |||
| Plain | 1⁄2 – 11⁄2 | DH3 | ||||
A687 | Plain | 5⁄8 – 3 | D | DH,DH3 | ||
| Galvanized | 5⁄8 – 3 | DH | ||||
| Any | 1⁄2 to 11⁄2 | A | B,D,DH | A,B,C,D,DH,DH3 | ||
| >11⁄2 to 4 | A | C,D,DH,DH3 | ||||
| Plain | 1⁄2 to 11⁄2 | A | B,D,DH | A,B,C,D,DH,DH3 | ||
| >11⁄2 to 4 | A | C,D,DH,DH3 | ||||
| Galvanized | 1⁄2 to 4 | A | C,D,DH,DH3 | |||
| Plain | 1⁄2 to 11⁄2 | D | DH,DH3 | |||
| >11⁄2 to 3 | DH | DH3 | ||||
| Galvanized | 1⁄2 to 3 | DH | DH3 | |||
| 1. Nuts made in accordance with the requirements of Specification A194 Grade 2H and marked with its grade symbol are an acceptable equivalent for Grade DH nuts. (per ASTM A563/A563M-21a, Table X1.1) | ||||||