Please fill out the form below for Assy Bracket Balance Weight and get a quote for part number 573-1139-01 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 573-1139-01. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.