Please fill out the form below for Screw Shoulder and get a quote for part number R683B42 by Dorer Engineering Inc with NSN 5305005516387 and FSC Name is 5305 Screws, 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 R683B42. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.