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> Flapper Box Clamp Bolt 914-6
DennisV
post Aug 18 2026, 07:40 PM
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Is this the correct bolt to secure the flapper box to the heat exchanger on a 914-6? Part number 901-211-631-00. Appears to be NLA. Paired with square nut.

It is what I removed from a pair of used flapper boxes I bought. I tried installing it on a new Dansk flapper / heat exchanger and it appears too short. Even if I try various clamps to compress the flange and close the distance.


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Puebloswatcop
post Aug 18 2026, 07:51 PM
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Dennis, I tried looking it up in the PET and other resources and it doesn't give a length. It sould be an M6 bolt although that is an assuption based on the fact that it shows the nut on it is M-6. Sorry its not much help, but you can at least check if its M6. if the one you have doesn't meet that spec, then you'll know its not right.
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