DIN 475-1 - DRAFT
DIN 475-1 - DRAFT
Draft Document - Widths across flats for bolts, screws, valves and fittingsstandard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2015
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2015