Please fill out the form below for Track Assy Aft Stak and get a quote for part number B831-4400-A3 by Electric Boat Corporation with NSN 3990015083046 and FSC Name is 3990 Miscellaneous Materials Handling Equipment, 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 B831-4400-A3. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.