Please fill out the form below for Therm Rel Valve and get a quote for part number 973A4-1 by Zodiac Industries Inc, 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 973A4-1. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.