NH Fuel Injector Replace

[SWOOLEY]

I've replaced the fuel injector pump but I need new washer/gaskets for the small line on top (fuel return line?). It has 2 metal washers with rubber on one side. Are these specialty items or can I just put new o-rings on the washers? Thanks
SW

 

[dieselscout80]

This maybe the NH part number you’re referring to SBA025100016 WASHER, SEAL. ​