Astro-Physics F516X112WF Counterweight Safety Washers: Small
One of these two Safety Washers is required with the Counterweight Safety Knob shown above. Use the larger M12009 with the 1.875" diameter shafts. The smaller F516X112WF is used for the 1.125" diameter shafts. DO NOT use your mount without the Counterweight Shaft Safety Knob and the appropriate Counterweight Safety Washer!
F516X112WF - 5/16" ID x 1.5" OD Stainless Steel for 1.125" diameter shafts with 6 and 9 lb. weights.
Recommended for: Mach1GTO, 400, 600 and 800 mounts.