Washer DIN 9021 M8(8,4) 200HV zinc-nickel black

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Washer DIN 9021 M8(8,4) 200HV zinc-nickel black
Washer DIN 9021 M8(8,4) 200HV zinc-nickel black креслення
Washer DIN 9021 M8(8,4) 200HV zinc-nickel black pdf Download the drawing PDF

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Specifications

Article no.

9021-8-200цнч

CoatingZinc-nickel black
StandardDIN 9021
Fastening groupHigh-strength fastening
Diameter, mm8
MaterialStal
Твердість200HV
Packaging, pcs.500
Зовнішній діаметр, мм24
Товщина, мм2
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Washer DIN 9021 M8(8,4) 200HV zinc-nickel black
Washer DIN 9021 M8(8,4) 200HV zinc-nickel black креслення

Enlarged washer is a fastener having the form of a flat disk with a smooth cylindrical hole in the middle, the diameter of which is larger than the diameter of the metric product with which it is used. Materials from which they are made: steel 140, 200.

Scope of use DIN 9021 is effectively used when joining materials with soft structure, such as wood, plastic and the like. Popularly also has the name "washer under the rivet", which indicates its appropriate use. It is also often used with DIN 571 self-tapping screws and DIN 975 threaded rods when installing wooden structures.  A characteristic feature of this washer is that the outer diameter is equal to 3 inner diameters, which helps to take into account these parameters in calculations and installation.

The material of manufacture is high-strength structural alloy steel. 

Zinc-nickel black coating: this coating is deep black, respectively, its presence on the product is imperceptible, and its advantage is additional resistance to corrosion.

Analogues GOST 6958-78, ISO 7093-1. ISO 7093-2.

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