金属防水接头型号是什么?

产品型号                       螺纹规格                   适用电缆直径   （mm）                       螺纹外径   （mm）                           螺纹长度   （mm）   PTM12                               M12x1.5                       3~6                                                                                   12                                                                                     5.5   PTM16                               M16x1.5                         4~8                                                                                   16                                                                                     7                                                                   PTM18                                   M18x1.5                       5~10                                                                           18                                                                                       7PTM20                                 M20x1.5                           6~11                                                                         20                                                                                     7.5   PTM22                                 M22x1.5                         8~13                                                                         22                                                                                             8 收起