Astro-Physics Flat Surface Adapter for 3600GTO Mount

Astro-Physics Flat Surface Adapter for 3600GTO Mount
Item # AP-3600FSA
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Waiting List

  • The AP Flat Surface Adapter is recommended when attaching the Astro-Physics 3600GTO Mount to the flat plate at the top of your chosen pier.
  • Once the 3600FSA is attached to the pier, the 3600 mount will fit into its inner diameter, and then will be bolted in to place with 8 3/8" bolts.
  • The adapter outer diameter is 12", it is 1-7/8" tall, and weighs 5.75 lbs.


Astro-Physics Flat Surface Adapter for 3600GTO Mount…

Astro-Physics strongly recommends the use of a flat top-plate and their 3600 Flat Surface Adapter when designing your setup for the 3600GTO mount, regardless of whether you are using a portable or a permanent pier. Bolt this adapter onto the flat plate at the top of your pier.

The AP 3600GTO Mount fits into the ID of the adapter; eight side bolts hold the mount in place. This adapter is machined from a solid plate and is ribbed in the base for strength and reduced weight. It is 12" OD, 1 7/8" tall and weighs 5.75 lb.


The Bolt Circle of the 3600FSA…

  • Eight (8) holes for 3/8" bolts on a 10.788" diameter bolt circle
  • Three (3) holes for 5/16" bolts spaced 4.25" from the center and one (1) hole, also for a 5/16" bolt 3.125" from the center. This spacing allows you to attach the adapter to the 1200 Standard Pier Adapter (1200SPA), which allows it to be used with a 10" diameter pier. Please note that this is not a recommended practice for a permanent setup or for a very large instrument, however.
  • Center hole for a 5/16" bolt to use if you choose.

Check out the dimensional drawing for the 3600FSA Flat Surface Adapter.

Additional Information

Additional Information

Manufacturer Astro-Physics
Warranty Limited Warranty
Included Items

Included Items

  • Astro-Physics Flat Surface Adapter for 3600GTO Mount
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