| Shape of Head: | Round |
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| Certification: | ISO, GS, RoHS, CE |
| Customized: | Customized |
| Available Material: | Carbon Steel, High Strength Steel, Stainless Steel |
| Head Type: | Hexagon, Round, Square, Countersunk, Pan, Mushroom |
| International Standard: | DIN, ANSI, GB, JIS, Bsw, GOST |
| Samples: |
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| Customization: |
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