SAE J429 is a spec that in intended for use in the automotive industry and similar industries. There are different types of grades for this spec that covers bolts, anchor bolts and studs – 1, 2, 3, 4, 5, 5.1, 5.2, 8, 8.1 and 8.2 in diameters up to 1-1/2”. Most commonly used and manufactured are Grade 5 and 8. Grade 2 is very similar to A307 and usually offered as A307 instead of Gr. 2.
|Grade||Material||Carbon, %||Phosphorus, %||Sulfur, %||Grade Marking|
|1||Low or Medium Carbon Steel||0.55 max||0.030 max||0.050 max||None|
|2||Low or Medium Carbon Steel||0.15 – 0.55||0.030 max||0.050 max||None|
|5||Medium Carbon Steel||0.28 – 0.55||0.030 max||0.050 max|
|8||Medium Carbon Alloy Steel||0.28 – 0.55||0.030 max||0.050 max|
|Grade||Nominal Size, inches||Full Size Proofload, psi||Yield Strength, min, psi||Tensile Strength, min, psi||Elong, min, %||RA, min, %||Core Hardness, Rockwell||Tempering Temperature, min|
|1||1/4 thru 1-1/2||33,000||36,000||60,000||18||35||B7 to B100||N/A|
|2||1/4 thru 3/4||55,000||57,000||74,000||18||35||B80 to B100||N/A|
|Over 3/4 thru 1-1/2||33,000||36,000||60,000||18||35||B70 to B100|
|5||1/4 thru 1||85,000||92,000||120,000||14||35||C25 to C34||800F|
|Over 1 thru 1-1/2||74,000||81,000||105,000||14||35||C19 to C30|
|8||1/4 thru 1-1/2||120,000||130,000||150,000||12||35||C33 to C39||800F|
Standard J995Finish Hex Nuts and Standard SAE or USS Washers is recommended.