Part Number MODEL STS-12 having (CAGE Code 16519) and FSC 3010 Torque Converters and Speed Changers in stock with ready to ship. Get an instant quote for MODEL STS-12 Coupling Shaft Flexible by Senior Flexonics Inc. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.