ASTM A193 Grade B16 Countersunk Screws

High Temperature Bolting

ASTM A193 Grade B16 Countersunk Screws

ASTM A193 Grade B16 Countersunk Screws Boltport manufactures ASTM A193 Grade B16 countersunk screws to ASME B18.3, B18.3.5M, DIN 7991, ISO 10642 and UNI 5933 standards, with coarse, fine and extra fine threads. We produce both metric and imperial sized countersunk screws to ASTM A193 Grade B16 specification.

These b16 countersunk screws can be used in high tensile bolting in boilers, pressure vessels, valves, pipeline flanges and fittings, intended for use in high-pressure or high-temperature service range between -20ºF (-30ºC) to +1100ºF (+593ºC).

Visit Specification page to find information on ASTM A193 Grade B16 chemical composition, mechanical properties, tensile strength, yield strength, hardness, heat treatment, thermal expansion, raw material properties, product marking, and referenced product standards, etc.,

For a quick quote on ASTM A193 Grade B16 Countersunk Screws, please contact our sales team at

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