It is always best to use the bolts the propeller manufacturer recommends.
Although they may be more expensive, they go through a rigorous quality inspection process, random sampling, and routine surveillance
of the manufacturer by Sensenich to ensure quality, conformity and safety.
Sensenich "bolts are made to the same material and process specifications as an AN-bolt with the exception of the thread length.
The primary concern is that a bolt does not bottom out in the engine flange bushing.
This normally leads to bolt fatigue and possible failure.
If you look at a standard AN bolt, there are very few threads. Maybe a half inch.
There may be enough there for your installation but not someone else's.
Most airframe installations are slightly different. Some use two bulkheads, some use one, some bulkheads are thicker than normal, etc.
Another problem you may have is finding standard AN bolts that are long enough for the installation.
You may be able to get an AN6H-43A but an AN6H-83A is not so readily available."
In many cases, a prop may be removed for inspection and reinstalled with the same hardware, thinking that the hardware must be correct.
This is not the case. The wrong bolts could have been installed many years ago. Remember, most of the General Aviation fleet is 30+ years old.
Always inspect the bolts for damage and proper length.
Call us at (888) 618-APEX or E-mail: sales@apex-inc.biz to order your specific Sensenich Propeller bolts.
