Please fill out the form below for Seal Plain and get a quote for part number 40210 ITEM NO 253 by Exlar Corporation with NSN 5330016409773 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 40210 ITEM NO 253. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.