ASTM A307 Grade A Bolts, Stud Bolts, Threaded Rods

ASTM A307 Grade A Carbon Steel Bolting with minimum tensile of 60 ksi.

ASTM A307 Grade A is grade specification in carbon steel bolting for use in general purpose application. This grade covers hex headed bolts, stud bolts, threaded rods or any other bolting having a minimum tensile strength of 60 ksi.

ASTM A307 Grade A Chemical Composition

Element % Grade A
Carbon, Max 0.29
Manganese, Max 1.20
Phosphorus, Max 0.04
Sulfur, Max 0.15

ASTM A307 Grade A Mechanical Properties

Grade Tensile, ksi Yield, min, ksi Elongation, min, %
Grade A 60 min -- 18

Compatible Nuts specification for ASTM A307 Grade A Bolting

ASTM A307 Grade A Washers
1/4" to 1-1/2" 1-5/8" to 4"
ASTM A563 A Hex ASTM A563A Heavy Hex ASTM F844

ASTM A307 Grade A Marking Requirement

Grade Details
Grade A Grade A Bolts are marked or stamped with "307A" along with optional manufacturer's Initial or logo.