wintermute The Grizzly 400 cooler: https://www.grizzlycoolers.com/shop/hard-sided-coolers/grizzly-400/ The width of this cooler in the places to drill for a bulkhead fitting is 1.75" Here is a bulkhead fitting that works: https://flexpvc.com/cart/agora.cgi?p=Bulkhead-Fittings-Custom&p_id=BH-20-007F&xm=on&ppinc=detail Threaded length will be between 1.75" and 2.5", hole size is 1.375" to 1.500". Connection points are 3/4” female national pipe thread. OVERALL LENGTH WILL BE ABOUT 1" LONGER THAN WALL, IE, ABOUT 3" GIVE OR TAKE.
