ASTM A453 Grade 660 Countersunk Screws

High Temperature Stainless Steel Fasteners

ASTM A453 Grade 660 Countersunk Screws

ASTM A453 Grade 660 Countersunk Screws Boltport offers ASTM A453 Grade 660 Countersunk Screws in Class A, B, C & D, manufactured to DIN 7991, ISO 10642, ASME B18.3, B18.3.1M & UNI 5933 standards, in metric and inch sizes with UNC, UN, UNF, UNEF, ISO, BSW & BSF threads. Grade 660 countersunk screws are available with full thread; part threads and custom thread design.

ASTM A453 Grade 660 Countersunk Screws
Tensile Class A B C D

Countersunk Screw Sizes & Thread Specifications

Metric Sizes M6 to M152
Inch Sizes ΒΌ" to 8"
Metric Threads ISO, ASME
Imperial Threads ASME, BSW, BSF
Thread Standards ISO 68-1, ISO 268, ISO 724, ASME B1.1, ASME B1.13M, BS 84, BS 3643

Countersunk Screw Standards

DIN ISO ASME UNI
Imperial Metric
7991 10642 18.3 B18.3.1M 5933