(1）The workpiece is usually immersed in a highly oxidizing chemical solution. For example, when the boiling temperature is 147-152 C, sodium hydroxide (600g/cm3) and sodium nitrite (100g/cm3) aqueous solutions, a beautiful, compact and anti-rust black iron oxide film is formed on the surface after a certain period of time. This process is sometimes called "bluing". It is widely used in clocks and watches, pointers, hairpins, screws, instrument shells and some mechanical parts.
(2)Product display
The product name is Small torx black micro screws,the raw material is carbon steel.The color of this flat head screw is black,the surface treatment is blackening treatment.The head of this micro screw is torx flat head,small high quality,high precision,high corrosion resistance.
（3）Product details
Place of origin:Guangdong,China (Mainland)
Product name:Small torx black micro screws
Color:Black
Head type:Torx flat head
Size:According to customer requirements
Certificate: ISO9001:2015,ISO14001:2015
Price:Factory direct price
Delivery method: By sea, by air or by express service
(5)Production process
(6)Service:
1.Customized design is available. ODM&OEM are welcomed.
2.Our products have passed the certification of ISO9001:2015,ISO14001:2015,ROHS,SGS quality management system, strict quality system, well trained technology workers, good reputation in the market.
3.We can provide customers with high quality test samples.Have any questions, please feel free to tell us, we will solve any doubt.
4.We always supply the factory price on the same quality level,and try our best to save the client's every cent.
5.Packed by customers' requirement.
(7)FAQ
1.What is the trading process?
Business negotiate → PI → Advance charge(or full payment) →Production→ inspection → Balance payment → Delivery.
2.How about your delivery time?
Generally, it will take 8-12 days after receiving your payment.The specific delivery time depends
on the items and the quantity of your order.
3.What is the quality of your products guarantee?
We have passed ISO9001:2015,ISO14001:2015 quality management system certification, ROHS testing report, SGS testing report, if the quality doesn't accord the standard, you can exchange the goods for free.