m12螺母内径,m12螺母尺寸

304不锈钢六角螺母 螺丝帽 螺帽 m1.6m2m2.5m3m4m5m6m8m10m12m16
304316不锈钢gb6181六角开槽螺母槽型螺帽m5m6m8m10m12m14m16
8级b56六角加厚螺母加长高强度螺母m10m12m14m16m18m20m30m36 内螺纹*
厂家直销国标外六角螺栓m12*16-150
304不锈钢细牙螺母六角细牙螺帽m8m10*1m12m14m16m18m20m22*1.