Please fill out the form below for Nut Self Locking Ex and get a quote for part number R399P2 by Columbia Nut And Bolt Llc with NSN 5310009646781 and FSC Name is 5310 Nuts and Washers, 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 R399P2. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.