Please fill out the form below for Cock Shutoff Screw and get a quote for part number 2640-787X1 PIECE 13 by Electric Boat Corporation with NSN 4820013569272 and FSC Name is 4820 Valves Nonpowered, please include required quantity along with expected turn around time. Our knowledgeable account manager will reply you shortly. Also check for the related parts for part number 2640-787X1 PIECE 13. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.