DIN 6796 | steel | spring steel | zinc-plated, thick-film passivated | Cr(VI) - free
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Surface (VZD): Mechanically galvanized, passivated, min. 8µm | corrosion resistance to DIN EN ISO 9227 | red rust 144h | defined coefficient of friction µ(total) = 0.12 - 0.18 for high-strength screws (= 8.8)
>*The verification of the mentioned minimum requirements is carried out according to the test conditions of ISO/CD 4042:2016, galvanic coatings for fasteners. For dimensions < M5, the above values may deviate downwards.
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Surface (VZD): Mechanically galvanized, passivated, min. 8µm | corrosion resistance to DIN EN ISO 9227 | red rust 144h | defined coefficient of friction µ(total) = 0.12 - 0.18 for high-strength screws (= 8.8)
>*The verification of the mentioned minimum requirements is carried out according to the test conditions of ISO/CD 4042:2016, galvanic coatings for fasteners. For dimensions < M5, the above values may deviate downwards.
Cr(VI) Note:
Cr(VI)-free
Form:
Round
Risk hydrogen embrittlement:
Material:
Spring steel
Installation method:
Assembly by hand
Surface:
mechanically zinc-plated, passivated
Application:
Joining by bolt, joining by stud, joining by screw
Product type:
Resilient washer, spring washers
Product group:
Washers
RoHS conformal:
Material:
Spring steel
VZD – the Cr(VI)-free alternative: Sustainable surface protection from Böllhoff
Fastening and assembly technology: Products and services
The Manual of fastening Technology: 8th edition
Böllhoff bulletin: Changeover to Cr6+-free protective zinc layers for fasteners