The was a German technical document titled "Flat Steel Products; Bright Steel Strips of Unalloyed Steels, Suitable for Cold Forming; Technical Delivery Conditions" (German: Flacherzeugnisse aus Stahl; Blankband aus unlegierten Stählen, geeignet zum Kaltumformen; Technische Lieferbedingungen ).
or rotating while you are tightening the bolt from the opposite side 1001 КРЕПЕЖ din 1624 standard pdf
The standard primarily refers to technical delivery conditions for cold reduced mild unalloyed steel strip with widths up to 650 mm. The was a German technical document titled "Flat