7.3硬质合金头901312M2.5*0.457.3硬质合金头901454#4-48UNF7.3钢900030M2.5*0.457.3塑料901994M2.5*0.457.3塑料902018#4-48UNF7.3红宝石120047M2.5*0.458.3硬质合金头902119M2.5*0.458.3钢900986M2.5*0.4515硬质合金头120049M2.5*0.4515红宝石120051M2.5*0.4520硬质合金头137391M2.5*0.4520红宝石137392M2.5*0.4525硬质合金头120053M2.5*0.4525红宝石120055M2.5*0.45