NIBCO 3 in. ABS Soil Pipe Hub x Spigot Adapter C5805HD3 - The Home Depot
Charlotte Pipe 3 in. x 4 in. ABS-Cast Iron Adapter Hub x Spigot ABS00123R1000HD - The Home Depot
Fernco 4" Clay/Cast Iron x 2" PVC/ABS Compression Donut at Menards®
Trap Adapters - simply connect your trap to your drain pipe
4" CI to 4" ABS - what is the correct flex coupling | DIY Home Improvement Forum
ABS Cast Iron Adapters – Canplas Industries Ltd.
Fernco 1056-44W 4-inch Flexible Pipe Coupling Plumbing Plastic PVC ABS, Cast Iron, Lead in White - Amazon.com
ABS to Cast Iron: Any plumbers online? - Plumbing Inspections - InterNACHI®️ Forum
cast iron to ABS? (or pvc) | DIY Home Improvement Forum
Fernco 4 in. Service Weight Cast Iron Hub x 4 in. Sch. 40 PVC Compression Coupling P44U-405 - The Home Depot
Fernco 1056-44W 4" Flexible Pipe Coupling Socket Plumbing Plastic PVC ABS, Cast Iron, Lead in White - Walmart.com
3001-22 - Fernco 3001-22 - 2" x 2" ProFlex Coupling (Cast Iron, PVC, Steel to Copper)
Somebody actually connected ABS directly to cast iron with lead and oakum. A lot more work to do it wrong than to just use a no-hub coupling. : r/Plumbing