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The Allen flat head bolt hardened steel 8.8, size M6 length 40 mm, manufactured according to DIN 7991, is made from hardened carbon steel and weighs approximately 6 grams. Its tensile strength is around 800 MPa, and its yield strength is near 640 MPa. The flat head with an internal hex drive ensures uniform force distribution across the contact surface and increases assembly precision in industrial joints, especially in light to medium machinery.
The thread pitch of this bolt is 1 mm, and the thread depth is calculated according to DIN 7991 standards to ensure uniform load transfer. The hardened threads provide high wear resistance and can withstand repeated fastening and dynamic loading. This design reduces premature thread wear, extends the service life of the connection, and ensures safe mechanical performance.
The Allen flat head bolt hardened steel 8.8 M6 length 40 has suitable surface hardness and high mechanical stability. It maintains its shape under normal ambient temperatures and moderate loading conditions, creating precise and reliable joints. Therefore, its applications in industrial machinery, metal equipment, structural connections, and sensitive mechanisms are widespread and standard.
WEBSITE: 6X40 8.8 DIN 7991 allen bolt Iran