RN型精密锁紧螺母 E-BNG10/12 E-BNR15 E-BKE51-M12/17/20/25/30

RNBNTABKE51螺母BNGCB

锁紧螺母BNR4/5/6/10/12/15/17/20/25/30/BNG20/BNRC8/BKE51方形