I have a Pacific Energy wood stove insert that is missing 2 bolts that hold the ash lip on. I tried a M6x20mmx1.0 pitch and it was really close, but not quite. 1/4-20 and 1/4x28 were not as good of a fit. Maybe M6 with 1.25 pitch? The manual doesn't say anything except to order a new hardware kit. Any ideas? thanks