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ASTM A 325 TYPE 1,TPYE3, ASTM A490 TYPE 1,TYPE 3 Heavy hex structural bolts
Materials:carbon steel,carbon boron steel,alloy steel, alloy boron steel,TYPE A,TYPE B,TYPE C,TYPE D,TYPE F
heavy hex structural bolt with quenched and tempered
| Dimension | Type | Description |
| 1/2in≤M≤1-1/2in | Type 1 | medium carbon,carbon boron, or medium carbon alloy steel |
| Type 3 | Weathering steel | |
| >1-1/2" | refer to A449 |

| A325 bolt type and finish | Nut class and finish | Washer finish |
| plain (noncoated) | A563-C,C3,D,DH,DH3,plain | plain (noncoated) |
| zinc coated | A563-DH,Zinc,coated | zinc coated |
| plain | A563-C3,DH3,plain | Weathering steel,plain |

| Zinc coating process | standard | |
| hot-dip | coating acc to F2329 | |
| Mechanically depositated | coating acc to B695 | |
| no preference | hot-dip zinc coating acc to F2329, OR mechanically depositated zinc coating acc with B695,C55 | |
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