Please fill out the form below for Block Assembly and get a quote for part number 642539200 by Duff Norton Co Inc with NSN 4030012787565 and FSC Name is 4030 Fittings for Rope Cable and Chain, 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 642539200. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.