Amazon.com : Telescope Scope Adapter Mount Base Dovetail Saddle Clamp with M6 M8 Countersunk Bores for Vixen Style Rail Bar Plate Astronomical Astronomy OTA Tripod Equatorial Mount Head - Support Drop-in Mounting :
10PCS Thread ADAPTERS M8 8MM Male to M6 6MM Female Threaded Reducers Stainless Steel Fastener Accessory: Amazon.com: Industrial & Scientific
Amazon.com: Fitting Reducer Metric M8 M8X1 Female to M6 X 0.75 M6X0.75 Male Gauge Meter Adapter : Automotive
4Pcs Double End Screw Bolts 304 Stainless Steel M6*1.0 to M8*1.25 Threaded Stud Fasteners (M6 to M8): Amazon.com: Industrial & Scientific
10PCS Thread ADAPTERS M8 8MM Male to M6 6MM Female Threaded Reducers Stainless Steel Fastener Accessory: Amazon.com: Industrial & Scientific
uxcell Roll-in Spring M6 T Nut, Roll Ball Elastic Nuts for 4040 Series Aluminum Extrusion Profile Suitable for Aluminum Profile with 8Mm Groove Depth, Pack of 12: Amazon.com: Industrial & Scientific