Hexagonal nut, low profile DIN 439, steel 04/05, zinc-plated, blue passivated (A2K)
DIN 439 steel zinc plated
NUT-HEX-DIN439-B-05-WS19-(A2K)-M12
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DIN 439 shape B has been withdrawn and replaced by ISO 4035. There is some similarity (strength classes for stainless steels changed from 50 to 025 and from 70 to 035) | Widths across flats changed for M10, M12, M14, M22 | Nominal diameter M1.8 removed | Only standard thread is included in ISO 4035.| Fine thread was moved to ISO 8675.
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