Please fill out the form below for Cover Assembly Control Valve and get a quote for part number 5-98319-21 by Boeing Company The, 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 5-98319-21. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.