Please fill out the form below for Stud 25 20 28X4 40 401850 and get a quote for part number 402158 by Teledyne Continental Motors, 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 402158. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.