Rear-nut mount, larger shell and higher current range, strong and tough connector designed for indoor/outdoor and underwater IP68 environments.
Mate with SP2110
 
Features
1) Shell diameter (the panel hole cutout diameter): 21mm
2) Number of contacts : 2 -15 gold plated contacts
3) Rated current and V : 30A-5A , 500V-400V, .
4) Cable outer diameter acceptance:  I: 4.5-7mm, II: 7-12mm, III: 5-9mm
5) CE , ROHS approval