The standard 1200 Pier Adapter was included with every mount shipped prior to 2003. Many people purchased an extra one to use on a second pier.
Beginning in 2004, we offer two choices for the pier adapter - the original standard version or the new Rotating Pier Adapter with Azimuth Bearing, (1200RPA).The Standard Pier Adapter includes the machined flat plate, four machined aluminum lock knobs with 5/16 x 1.5"OD flat washers, azimuth adjuster block, six 5/16-18 x 5/8" socket buttonhead screws and 5/16 x 9/16"OD x 0.060" flat washers. All machined parts are black anodized and the fasteners are stainless steel. The adapter plate fits into your Astro-Physics Portable Pier and is bolted from the side or bolts on top of a flat surface. If you plan to use an ATS pier, the O.D. of the plate will be modified by ATS for an additional charge.