Part Number SI411 having (CAGE Code 23540) and FSC 5970 Electrical Insulators and Insulating Materials in stock with ready to ship. Get an instant quote for SI411 Insulator Plug by Niagara Plastics L L C. 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.