EXPERTS IN FASTENERS AND WELDING SOLUTIONS
when everything fits
DIN 125 washers are the most commonly used reference in industrial fasteners and mechanical assemblies. Available in HV140 and HV200 grades and in zinc-plated, hot-dip galvanised, A2 and A4 stainless steel or brass finishes, they offer reliable performance in both general applications and environments exposed to moisture or corrosion. >
DIN 7349 washers are designed to work with screws fitted with a spring pin. They are used in articulated systems, automotive and machinery, where firm support is required in assemblies subject to movement or vibration.
DIN 9021 washers have a larger outer diameter than standard washers, which favours load distribution on thin sheets, panels and materials. Their zinc-plated, hot-dip galvanised and A2/A4 stainless steel versions allow them to be used in metalwork, enclosures and outdoor installations.
The right choice depends on the type of screw, the base material and the installation environment. HV140 washers are suitable for general fastening with 8.8 hardware, while HV200 or HT versions provide better performance when working with 10.9/12.9 screws or in applications subject to vibration. Zinc-plated finishes are used for indoor applications, while hot-dip galvanised or A2 and A4 stainless steel finishes are recommended for outdoor, wet or aggressive environments.
In soft materials or thin sheets, it is preferable to use wide washers such as DIN 9021 or type R according to DIN 440, as they improve load distribution and reduce deformation. For structural joints, DIN 7989 washers offer greater safety against high loads, while DIN 7349 washers provide stable fastening in moving or articulated mechanisms.
Choosing the right model ensures reliable tightening and a durable connection in any industrial or structural assembly.
