5/16 X18 Most are that size on mine a 52-3100 there are some 1/4 20 on the bottom splash apron and on the top were the hood latch is ,but most are 5/16s.
For just mocking up You could just buy a bunch of 5/16 X 1 inch and some 5/16 X 1 washers.
Pete
Last edited by cletis; 12/05/2010 1:14 AM. Reason: thread count (5/16-18)