ASTM A307 Recommended Hardware

 

 

 

 

 

 

 

 

 

 

Nuts Washers
A307 Grades A & C* A307 Grade B F844
1/4 - 1-1/2 1-5/8 - 4 1/4 - 4
A563A Hex A563A Heavy Hex A563A Heavy Hex