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similar to DIN 912 | DIN standard has been withdrawn
ISO 4762 | steel | 8.8 | zinc-plated, thick-film passivated (VZD) | Cr(VI)-free | metric thread
Note: similar to DIN 912 | changed nominal lengths | the fine thread has been transferred to ISO 12474
Surface (VZD): galvanized, thick-film passivated, min. 5μm | corrosion resistance to DIN EN ISO 9227*: white rust 72h, red rust 144h | defined coefficient of friction μ(total) = 0.12 - 0.18 for elements with a nominal tensile strength ≥ 800 MPa
*The verification of the mentioned minimum requirements is carried out according to the test conditions of DIN EN ISO 4042, galvanic coatings for fasteners. For dimensions < M5, the above values may deviate downwards.
Note: similar to DIN 912 | changed nominal lengths | the fine thread has been transferred to ISO 12474
Surface (VZD): galvanized, thick-film passivated, min. 5μm | corrosion resistance to DIN EN ISO 9227*: white rust 72h, red rust 144h | defined coefficient of friction μ(total) = 0.12 - 0.18 for elements with a nominal tensile strength ≥ 800 MPa
*The verification of the mentioned minimum requirements is carried out according to the test conditions of DIN EN ISO 4042, galvanic coatings for fasteners. For dimensions < M5, the above values may deviate downwards.
Material version:
8.8
Cr(VI) Note:
Cr(VI)-free
Flange/washer:
without flange
Risk hydrogen embrittlement:
Thread type:
Metric thread
Head shape:
Cylinder head
Force application:
Hexagon socket
Material:
Steel 8.8
Installation method:
Screw into place with tool
Surface:
zinc-plated, thick-film passivated (VZD)
Product type:
Cap screw with internal driving feature
Product group:
Screws
RoHS conformal:
Material:
Steel
Please log in for CAD-Downloads.
The Manual of fastening Technology: 8th edition
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners
Fastening and assembly technology: Products and services
VZD – the Cr(VI)-free alternative: Sustainable surface protection from Böllhoff