Part Number 187 253A 6 having (CAGE Code 0R8N4) and FSC 5985 Antennas Waveguides and Related Equipment in stock with ready to ship. Get an instant quote for 187 253A 6 Adapter Waveguide by Advanced Technical Materials 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.