|Sucket Bolt , Allen Bolt|
|Hex Nuts and Heavy Hex Nuts|
American Standard Grade 5 bolts have three lines on top of the bolt head and are manufactured of medium carbon rods and have tempering process. Grade 5 bolts have significantly lower strength compared to grade 8 bolts and are often used in machinery industry.
Grade 5 bolts provide 120 ksi tensile strength for diameters lower than one inch and 105 ksi for diameters higher than one inch.
|Hardness Max - rockwell||Hardness Min - rockwell||Tensile Min ksi||Yeild Min ksi||Proof Load ksi||Size in||Bolt Grade|
|B100||B80||74||57||55||1/4 -3/4||SAE J429 Grade 2|
|C31||C19||105||81||74||1 1/8 -1 1/2||SAE J429 Grade 5|