similar to DIN 7991
ISO 10642 | steel | zinc-plated, thick-film passivated (VZD) | Cr(VI) - free | metric thread
Note: Similar to DIN 7991 | the head height and head diameter have been partly changed | due to the head geometry, these screws have only a limited load bearing capacity, see DIN EN ISO 898-1
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 7991 | the head height and head diameter have been partly changed | due to the head geometry, these screws have only a limited load bearing capacity, see DIN EN ISO 898-1
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:
Countersunk head
Force application:
Hexagon socket
Material:
Steel 8.8
Installation method:
Screw into place with tool
Surface:
zinc-plated, thick-film passivated (VZD)
Product group:
Screws
RoHS conformal:
Material:
Steel
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners
The Manual of fastening Technology: 8th edition
Fastening and assembly technology: Products and services
VZD – the Cr(VI)-free alternative: Sustainable surface protection from Böllhoff
