Includes the custom made machined flat plate and 5/16-18 x 5/8 side bolts and washers.
Note, this adaptor is custom made and not from Astro-Physics. I used it for several months with my AP 8” pier while my AP plate was away at ATS for fitting. It worked fine and is very solid. Mount lock knobs and azimuth adjuster block not included.
$40 includes shipping. Bank check, MO or PayPal ($42).