what size thread

[jamesbaa]

what size thread do i need to order???

http://cgi.ebay.co.uk/OIL-PRESSURE-...ryZ43120QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[jamesbaa]

come on people, some one must know!!!

 

[G6Turbo]

3/4" UNF X 16 Tpi