Carbon Steel Black Oxide Class 8.8 Carriage Bolts Black Color Square Neck Bolts Cup Head Square Neck Bolts
|Finish||Black Oxide||Material||Carbon Steel|
|Standard||DIN||Product Name||Black Oxide Class 8.8 Carriage Bolts|
|Grade||Grade8.8||Surface Treatment||Black Oxide|
|Certificate||ISO 9001:2015 CE||Packing||Carton|
|Sample||Avaliable||Port||Shanghai Or Ningbo|
Carbon steel Black oxide class 8.8 carriage bolts Black color square neck bolts Cup Head Square Neck Bolts
We have all standard DIN, BS, JIS and ISO fasteners and other industrial parts with well-equipped testing facilities and strong technical force.
The quality control is strictly performed from buying raw materials in warehouse to different machining procession and to final packing.We have Magnetic Powder Detector, Material Testing Machine, Metallographic Microscope, such testing instruments, guarantee product high quality and beautiful appearance.
First, we have our own High-precision Digital Machining center for mould making in special Mould Workshop, excellent mould make product beautiful appearance and its size accurately.
The second, we adopt blasting procession, removing Oxidation surface, make the surface to be bright and clean and uniform and beautiful.