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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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aturboman
post Aug 22 2026, 06:25 PM
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Here is an NOS valve and retainer bolt/nut. Interestingly the replacements were black oxide type finish with the unique locking nut.
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