Please fill out the form below for Hdst Mic Behind Hd H4240 and get a quote for part number H4240 by David Clark Company Incorporated, 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 H4240. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.