31 replies to this topic

[Spider]

 

Standard sump plug is 5/8" UNC thread.

You can drill and tap out up to M20 - Spider does a good write up of doing that here: https://www.theminif...ead-repair-kit/

 

BSW I believe although very similar to UNC.

 

 

Respectfully, it is a UNF Thread Form.

 

Sorry this is not a brilliant scan, but the best I can do. This is from the factory drawing of it;-

 

 

[gav]

Ah my drawing shows BSW but not sure on it's authenticity so UNC is prob correct :)