• Tel
• 09121933785
• | Cell
• 09121933785

Grade 10.9 steel Allen screw

A steel Allen bolt grade 10.9, according to ISO 898-1, is recognized as a high-strength threaded fastener. These bolts have a nominal tensile strength of 1040 megapascals and a minimum yield strength of 940 megapascals. The material used is alloy steel, heat-treated through quenching and tempering. The thread angle is 60 degrees, and the typical thread tolerance class is 6g. They are manufactured in sizes ranging from M3 to M36, with lengths from 6 to 300 millimeters. Due to their high hardness, the recommended tightening torque for an M10 bolt in this grade is approximately 60 to 70 newton meters.

Allen bolts in grade 10.9 are commonly defined by DIN 912 or ISO 4762 standards and feature a cylindrical head with an internal hex socket. The head diameter is typically 1.5 times the nominal thread diameter. For instance, an M8 bolt has a head approximately 13 millimeters in diameter and 8 millimeters in height. Surface hardness should be between 32 and 39 HRC according to standards. These bolts are usually coated with zinc plating, phosphate, or black oxide for corrosion protection. They are widely used in automotive systems, heavy machinery, hydraulic equipment, and high-stress structural assemblies. The internal socket design allows precise installation in tight spaces.

WEBSITE: Grade 10.9 steel Allen screw Iran