UNE 17708:1978

ROSCA METRICA ISO PARA USOS GENERALES. TOLERANCIAS. LIMITES DE DIMENSIONES PARA ROSCAS DE TORNILLOS Y TUERCAS COMERCIALES. CALIDAD MEDIA

ISO GENERAL PURPOSE METRIC SCREW THREADS. TOLERANCES. LIMITS OF SIZES FOR COMMERCIAL BOLT AND NUT THREADS. MEDIUM QUALITY.