Engine mounting bolts

[AndyCapp]

Hi All,

Can someone let me know the size  of the mounting bolts that protrude through the rubber engine mountings on a M20J.

Thank you..

[Shadrach]

AN7-44A

 

[AndyCapp]

Hi Shadrach,

Thank you for this. I am looking for the  actual diameter ( mm or inches).

Regards

Andy

[Bob_Belville]

5 minutes ago, AndyCapp said:

Hi Shadrach,

Thank you for this. I am looking for the  actual diameter ( mm or inches).

Regards

Andy

Shadrach gave you the spec:

AN7-44A - Airframe Bolt 7/16-20, 7/16 X 4 1/2 (OAL), 3 15/16 (GRIP) Non Drilled Shank - Minimum tensile strength 125, 000 PSI. Cadmium II plated

[Dale Logsdon]

An AN7 bolt is .437" max. to .433" min. dia.

[MooneyBob]

I am just curious what is the torque for these bolts on J? I will be putting my engine back soon. 

[Shadrach]

55 minutes ago, AndyCapp said:

Hi Shadrach,

Thank you for this. I am looking for the  actual diameter ( mm or inches).

Regards

Andy

Andy,

AN stands for Army/Navy standard and is not unique to any particular aircraft. The number listed is very specific set of specs. There is an alternative NAS (National Aerosoace Standards) spec bolt given as well. A quick google search of either bolt number will give you the specs.

[AndyCapp]

Thank you all for the information and education

Excuse my ignorance but here in South Africa things work a bit differently.

Regards

Andy