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DIN EN ISO 7721-2:1994
Countersunk flat head screws - Part 2: Penetration depth of cross recesses (ISO 7721-2:1990); German version EN ISO 7721-2:1994
This document contains the penetration depth of cross recesses of countersunk flat head screws for the series 1 and 2.
Deutsches Institut für Normung [din]