Please fill out the form below for Retaining Ring 5131 12H and get a quote for part number 939140201 by L 3 Communications Avionics Systems, 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 939140201. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.