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Specifications
Article no.	979-20-4
Type	Castle
Threading step, mm	2.5
Standard	DIN 979, ISO 7038, ГОСТ 5919-73, ГОСТ 5932-73
Fastening group	Stainless steel fasteners
Diameter, mm	20
Material	Stainless steel A4
Type of carving	Full
Thread type	Metric
Height, mm	16

Nut DIN 979 M20 A4

979-20-4

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Crown nut these are nuts that are used on various types of axles and shafts, where there are vibration and dynamic loads. Holes are drilled in these axles, in which, after tightening the nut, cotter pins are inserted, which in turn pass through the vertical slots in the nut. This allows you to securely lock the nut and prevents it from unscrewing when vibrating.

Scope DIN 979 is used in mechanical engineering, construction.

Material stainless steel. The grade of steel A4 allows to use fastenings at considerable differences of temperature and in the aggressive and humid environment.

No coating.

Analogs GOST 5932-73. GOST 5919-73. ISO 7038