Keep an extra on hand
Keep an extra one of these assemblies on hand, as it may be IMPOSSIBLE to get the old one off without destroying it, even if your original objective was just to replace the #85659 rubber washer. My Presto pressure cooker is early 1980s vintage, and when I tried to unscrew the two aluminum parts of the lock I found -- to no great surprise -- that they were frozen together. The easiest thing was to gently file the narrow flange on the outer end off with a small mill file and discard the old assembly. To avoid grief the next time, put a little anti-seize lubricant on the threads before assembling the new one. You can find this grease-like stuff from Loctite or Permatex at most auto parts stores, or see ASIN B0002UEOLO here at Amazon.com for a small tube. It's a silvery petroleum-based paste fortified with graphite and metal flakes and the tiny amount needed is quite safe to use in this application.
This interlock assembly from Presto National has been redesigned ("for...
Good Replacement Part
This part is ultra simple, but necessary to to use the pressure cooker it fits. It unscrews then screws tightly back together to keep it secure in the hole. I found this part to fit and perform it's intended function. Decent price, and fast delivery.
Fit perfectly
This was easy to replace on my pressure canner. Haven't had any problems since I installed it. Love the product.
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