DIN EN 4121-2006 航空航天系列.螺纹上镀银的耐热钢FE-PA2601(A286)制自锁紧、锯齿状带柄螺母.等级:1100MPa(环境温度)/650℃
Aerospace series - Shank nuts, serrated, self-locking, in heat resisting steel FE-PA2601 (A286), silver plated on thread - Classification: 1100 MPa (at ambient temperature)/650 °C; German and English version EN 4121:2004