| Material: | Carbon Steel |
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| Type: | Hexagon Head |
| Connection: | Common Bolt |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier Blackening, also known as boiling blackening or bluing, is a method of finishing steel. The coating film is formed by the reaction between the liquid medicine and the material of the workpiece itself. The thickness of the film after oxidation treatment is 0.5-1.5 microns, which has no significant influence on the size and accuracy of the parts. Oxidation treatment of iron and steel parts is widely used in the general protection and decoration of mechanical parts, precision instruments, cylinders, springs, weapons and daily necessities. Its film wear resistance is better, dark and shiny, extremely beautiful.
Suppliers with verified business licenses
Audited Supplier 
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