Please fill out the form below for Valve Gate and get a quote for part number A-6683 4IN by Fairbanks Co The with NSN 4820004632191 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 A-6683 4IN. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.