Please fill out the form below for Back Up Ring Prefor and get a quote for part number 09-20300 REV A ITEM 9 by Young Engineering And Manufacturing with NSN 5330016188244 and FSC Name is 5330 Packing and Gasket Materials, 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 09-20300 REV A ITEM 9. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.