| STD | MATERIAL | CLASS | PLATING |
| GB845，GB846，GB15856，GB2670，ASME B 18.6.3 | 20A，22A，A2-70等 | CARBURIZE | 发黑，电镀锌，达克罗,本色 |
| SPECS | LENGTH (MM) |
BLACK/ZINC/DACROMET/RAW
|
|
| ST2.9 | 6.5~50 | ||
| ST3.5 | 9.5~50 | ||
| ST4.2 | 9.5~50 | ||
| ST4.8 | 9.5~50 | ||
| ST5.5 | 13~50 | ||
| ST6.3 | 13~50 | ||
| ST8 | 16~50 | ||
| ST9.5 | 16~50 | ||
| 1/4 | 13~50 | ||
| 5/16 | 16~50 | ||
| 3/8 | 16~50 | ||
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