These are standard Centronic Connectors with metal shell.
| Order# | # of Contacts | Gender | 
| 57-30500 | 50 pin | Male | 
There are several other types of straight PCB solder centronics connectors available below.
| Order# | # of Contacts | Gender | 
 | Order# | # of Contacts | Gender | 
| 57-30360 | 36 | Male | 
 | 57-60360 | 36 | Female | 
| 57-30500 | 50 | Male | 
 | 57-60500 | 50 | Female | 
 
    
             
 
 
 
 
  
 