Please fill out the form below for Retaining Ring and get a quote for part number MS16624-4028 by L 3 Avionics, 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 MS16624-4028. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.