These modular plug connectors are used in making telephone and networking cables.
The best standard combination for making computer networking of Cat5E or Cat6 cable is the modular plug 70-619Â using modular crimping tool 70-0317.
Connector comes with gold plated contacts.
There are several types of modular connectors available below.
 Order# |  Fig |  RJ  |  #Positions x Contacts |       Type           |       Cable   |  Crimping tool |
 70-020 |  1 |  10 |  4 x 4 |  Handset |  Flat |  70-0314 |
 70-025 |  2 |  11 |  6 x 4 |  Wall Jack  |  Flat |  70-0315 |
 70-030 |  3 |  12 |  6 x 6 |  Wall Jack  |  Flat |  70-0315 |
 70-035 |  4 |  45 |  8 x 8 |  No-Key  |  Flat |  70-0317 |
 70-618 |  3 |  12 |  6 x 6 |  Solid Wire  | Round |  70-0315 |
70-619 | 4 | 45 | 8 X 8 | Solid wire  | Round | 70-0317 |
 70-619A |  4 |  45 |  8 x 8 (Shielded Case) |  Solid Wire  | Round |  70-0317 |
70-619A-PT | 4 | 45 | 8 x 8 (Shielded Case) | Stranded/Solid wire |  Round |  70-0317 |
 70-619B |  4 | 45 | 8 x 8 plated case | Stranded wire |  Round |  70-0317  |
70-619-PT | 4 | 45 | 8 x 8 pass thru | Stranded/Solid wire |  Round |  70-0137 |
70-615 | 4 | 45 | Â 8 X 8Â | Â Stranded 8 x 8 | Round | 70-0317 |
 70-620 |  5 |  48 |  10 x 10 |  Solid wire 10 x 10 |  Round |  HT-2092 |
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The best standard combination for making computer networking of Cat5E or Cat6 cable is the modular plug 70-619 and using modular crimping tool 70-0317.