Part Number 121937 having (CAGE Code 08683) and FSC 3040 Miscellaneous Power Transmission Equipment in stock with ready to ship. Get an instant quote for 121937 Shaft Choke by Brockway Motor Trucks Div Of Mac. 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.