Please fill out the form below for Nut Plain Extended and get a quote for part number 31WLF1420 by Mac Lean Fogg Lock Nut Co with NSN 5310001601606 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 31WLF1420. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.