Product information:

Product Name: 12.9 Grade Alloy Steel Socket Head Cap Screws

Material: 12.9 grade alloy steel

Size: For example 5/16-18*1  (thread diameter 5/16 inch , 1 inch length, does not include the head length) 
Choose size: on list

 

    Grade 12.9 socket head cap screws are the most commonly used series of high strength screws: Grade 12.9 socket head cap screws are generally used in cases with high mechanical performance requirements. Such as injection molding machines, hydraulic equipment, mold and other places. The surface hardness of 12.9 grade socket head cap screws after heat treatment can reach 39-44 degrees.

    The surface of the 12.9 grade socket head cap screws is cyanidated and blackened, and the product itself also has a certain anti-rust function. However, these high-strength grade 12.9 screw series are mainly used in some equipment for export. During transportation, some relatively harsh environments will corrode the surface of grade  12.9 socket head cap screws (such as shipping). And some appliances themselves require the matching products with socket head cap screws to be nickel-plated and electroplated to improve the corrosion resistance and appearance of 12.9 high-strength screws (such as bread machines, bakers, etc.).

With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.

 

 

The threads of these Screws are Inch coarse threads!

These screws are fully threaded.
The data is a single batch, manual measurement, there are errors!
The color of the photo may have a color difference due to the monitor!

 

According to your choice!
If you need to purchase more than the inventory, please contact customer service to buy!