L材料货号A7.3硬质合金头901312M2.5*0.45 901454#2.5*0.45 钢900030M2.5*0.45 塑料901994#4-48UNF 902018M2.5*0.45 红宝石120047M2.5*0.458.3*硬质合金头902119M2.5*0.45 钢900986M2.5*0.4515硬质合金头120049M2.5*0.45 红宝石120051M2.5*0.4520硬质合金头137391M2.5*0.45 红宝石137392M2.5*0.4525硬质合金头120053M2.5*0.45 红宝石120055M2.5*0.45