Get price for bolts, screws, stud bolts, nuts, washers and much more in ASTM A453 Grade 660 Class material specification. ASTM A453 Grade 660 is a material specification covering bolts, stud bolts, nuts and other fasteners for high temperature bolting applications. Boltport offers a wide range of standard and custom fasteners in ASTM A453 Grade 660 Class A/B/C & D tensile class. For more information, please check the link.












