Please fill out the form below for Connection Nut and get a quote for part number MCK-PK4 by Eurocopter American, 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 MCK-PK4. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.