BOLT SET SPECIFICATIONS

 

 Bolt Specification Information

 

Grade Identification Marking

         Specification ASTM A307

             Material

Nominal Size inch Tensile Strength ksi Hardness Rockwell Min Hardness Rockwell Max

                          No Mark

                  Grade A

Low or Medium Carbon Steel

           ¼ - 4

             60 Min

         B79         B100
                 No Mark                    Grade B

Low or Medium Carbon Steel

            ¼ - 4

             60 Min 100 Max

           B69           B95

 

Nut Specification Information

Grade Indentification Marking

   Specification ASTM 563

         Material

Nominal Size   inch Proof Load Stress   ksi Hardness Rockwell Min Hardness Rockwell Max

No Mark

Grade A Carbon Steel ¼ - 1-1/2 90 B68 C32
No Mark Grade B Carbon Steel ¼ - 1 120 B69 C32

No Mark

Grade B

Carbon Steel

>1 - 1-1/2 105

B69

C32