8.8级高强度黑色双头螺栓GB901-BM18M20M22*60-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM20M22M24*60-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM18M20M22*60-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM20M22M24*60-300mm国标螺柱螺丝

8.8级高强度黑色双头螺栓GB901-BM14M16M18*50-300mm国标螺柱螺丝

【纸版图书】GB899-1988双头螺柱bm=1.5d

【纸版图书】QC/T870-2022双头螺柱bm=1.25d

【纸版图书】QC/T871-2022双头螺柱bm=2d

【纸版图书】GB897-1988双头螺柱bm=1d

【纸版图书】GB898-1988双头螺柱bm=1.25d

【纸版图书】GB900-1988双头螺柱bm=2d

GB 899-1988 双头螺柱bm=1.5d

GB 900-1988 双头螺柱bm=2d

GB 897-1988 双头螺柱 bm=1d

GB 898-1988 双头螺柱bm=1.25d

GB 898-1988 双头螺柱bm=1.25d

GB 897-1988 双头螺柱 bm=1d

GB 900-1988 双头螺柱bm=2d

GB 899-1988 双头螺柱bm=1.5d