tonyjohnson
Well Known Member
I am installing my cabin heat box. Some people use stainless steel rivets to attach the box to the firewall, but I prefer to use screws so that it will be removable later without having to drill out the rivets.
I am wondering if it is appropriate to use nylock nuts on the "cool" side of the firewall to secure the stainless steel screws, the heads of which will be on the "hot" side. I can see a scenario where a fire in the engine compartment would heat the stainless steel screws to the point that it may melt the nylon on the nuts holding the box onto the firewall even though the nuts are on the "cool" side. I don't think the box would depart the firewall even if the nylon melted but I want to make sure that I am in conformance with good practice and safety.
If nylock nuts are not appropriate, what nut would be best?
Perhaps one of the DARs here or someone with knowledge of the subject can help.
Thanks
I am wondering if it is appropriate to use nylock nuts on the "cool" side of the firewall to secure the stainless steel screws, the heads of which will be on the "hot" side. I can see a scenario where a fire in the engine compartment would heat the stainless steel screws to the point that it may melt the nylon on the nuts holding the box onto the firewall even though the nuts are on the "cool" side. I don't think the box would depart the firewall even if the nylon melted but I want to make sure that I am in conformance with good practice and safety.
If nylock nuts are not appropriate, what nut would be best?
Perhaps one of the DARs here or someone with knowledge of the subject can help.
Thanks