Please fill out the form below for Screw Cap Socket Head and get a quote for part number 31-BLS-4C-43 by Star Stainless Screw Co with NSN 5305016516294 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 31-BLS-4C-43. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.