ASTM A193 Grade B7 Countersunk Screws

High Temperature Bolting

ASTM A193 Grade B7 Countersunk Screws

ASTM A193 Grade B7 Countersunk Screws Boltport is a manufacturer and supplier of ASTM A193 Grade B7 Hex Socket Countersunk Screws as per ASME B18.3, B18.3.5M, DIN 7991, ISO 10642 and UNI 5933 dimension standards. We offer countersunk screws in complete range of metric and imperial sizes with coarse, fine and extra fine threads. These B7 Countersunk Screws are produced with full compliance to requirements of ASTM A193 Grade B7 specification and are suitable for high tensile bolting in high-pressure or high-temperature service environment.

Visit Specification page to find information on ASTM A193 Grade B7 chemical composition, applicable heat treatment, mechanical properties such as tensile strength, yield strength, hardness requirement, product marking, and applicable product standards.

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Countersunk Screw Sizes & Thread Specifications

Metric Sizes M1.6 – M20
Inch Sizes #0 to 1-1/2"
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

Imperial Metric
7991 10642 18.3 B18.3.1M 5933

Applicable Coatings