Latest! Confirmed fastener manufacturer identification mark.

When we buy fasteners, we will find that there are some symbols in the header, that is, some numbers and letters. So, what do these symbols mean?

 

① Represents the place of origin, the pinyin initials of the place name;

② Represents the tensile strength of the bolt. The grades we use every day are 4.8, 8.8, 10.9, and 12.9. The grade label is composed of two numbers, which respectively represent the nominal tensile strength value and yield ratio of the bolt material.

For example, for A. B bolts, the number A in front represents the nominal tensile strength value of the bolt, expressed as a value of 1/100; the ".B" (point B) in the back represents the ratio of the bolt's yield strength, and the value multiplied by the number in front represents the nominal yield strength of the bolt.

AX100 = Nominal tensile strength of this bolt AX100X (B/10) = Nominal yield strength of this bolt

For example, a 6.8-grade hexagonal bolt has the following meanings:

The nominal tensile strength of the bolt is 6X100 = 600 MPa = 600 N/mm2, that is, the minimum tensile force per square millimeter is 600 N.

2. The following .8 (point 8) represents a yield strength ratio of 0.8.

3. The nominal yield strength of the bolt is = 600x0.8 = 480Mpa = 480 N/mm2, that is, the yield force per square millimeter is 480 N.

In general, the higher the grade of a bolt, the greater its tensile strength and yield strength, and the higher the strength of the bolt.

③ Symbol representing the manufacturer.

 

① The A2--70 refers to the type of material, generally there are two kinds of A2 and A4. "A2-70" is the performance mark of screws, studs and nuts, representing the type of material. A2-70 means: A represents austenitic stainless steel, 2 represents 304 material, if it is A4, where 4 represents SUS316 stainless steel, the number part "70" after "-" indicates the performance grade of the product, and its number is the minimum tensile strength of 700N/mm2 (700MPa).

② It also represents the manufacturer's logo, just like our name.

 

The circled M12 in the figure represents the diameter of the thread at 12 mm.

 

The 5.1T in the figure represents the maximum tensile strength of the bolt.

When we buy fasteners, we will find that there are some symbols in the header, that is, some numbers and letters. So, what do these symbols mean?

 

① Represents the place of origin, the pinyin initials of the place name;

② Represents the tensile strength of the bolt. The grades we use every day are 4.8, 8.8, 10.9, and 12.9. The grade label is composed of two numbers, which respectively represent the nominal tensile strength value and yield ratio of the bolt material.

For example, for A. B bolts, the number A in front represents the nominal tensile strength value of the bolt, expressed as a value of 1/100; the ".B" (point B) in the back represents the ratio of the bolt's yield strength, and the value multiplied by the number in front represents the nominal yield strength of the bolt.

AX100 = Nominal tensile strength of this bolt AX100X (B/10) = Nominal yield strength of this bolt

For example, a 6.8-grade hexagonal bolt has the following meanings:

The nominal tensile strength of the bolt is 6X100 = 600 MPa = 600 N/mm2, that is, the minimum tensile force per square millimeter is 600 N.

2. The following .8 (point 8) represents a yield strength ratio of 0.8.

3. The nominal yield strength of the bolt is = 600x0.8 = 480Mpa = 480 N/mm2, that is, the yield force per square millimeter is 480 N.

In general, the higher the grade of a bolt, the greater its tensile strength and yield strength, and the higher the strength of the bolt.

③ Symbol representing the manufacturer.

 

① The A2--70 refers to the type of material, generally there are two kinds of A2 and A4. "A2-70" is the performance mark of screws, studs and nuts, representing the type of material. A2-70 means: A represents austenitic stainless steel, 2 represents 304 material, if it is A4, where 4 represents SUS316 stainless steel, the number part "70" after "-" indicates the performance grade of the product, and its number is the minimum tensile strength of 700N/mm2 (700MPa).

② It also represents the manufacturer's logo, just like our name.

 

The circled M12 in the figure represents the diameter of the thread at 12 mm.

 

The 5.1T in the figure represents the maximum tensile strength of the bolt.