m12螺母尺寸,m12螺母尺寸规格图

304不锈钢螺母六角螺丝帽m1.6m2m3m4m5m6m8m10m12m14m16m18-m33
厂家直销m8热镀锌外六角螺母m10国标螺帽盖m12非标m24热镀锌螺帽
gb6175加厚六角螺母m12m14m16m18m20m22m24m27m30m33m36m39m42
细牙六角开槽螺母槽型螺母带槽螺帽螺母m10m12m14m16m18m20m22m24
304不锈钢六角螺母螺帽m1m2m2.5m3m4m5m6m8m10m12m14m16m18m20m30