The SP17, SP13 and SP21 serious are IP68 connectors, threaded coupling.
SP17 is the medium sized plastic shell IP68 waterproof connector.
Compare to SP13, SP17 has a bigger and stronger shell, bigger cable outer diameter acceptance, higher voltage, it is a very strong and very tough connector designed for much harsher environments.
The connectors can be used for both cable to cable (in-line) and cable to panel-mount connections. Each side can be male or female contact, (Plug or socket versions), currently the IP68 Sealing caps are available for panel connector only.
1) shell diameter (the panel hole cutout diameter): 17mm
2) number of contacts : 2 -10 gold plated contacts
3) rated current and V: 10A-5A , 500V-400V
4) cable outer diameter acceptance : 6-10mm
5) CE , ROHS approval