Please fill out the form below for Drill Twist and get a quote for part number R89CO 50 by Precision Twist Drill Co with NSN 5133013719998 and FSC Name is 5133 Drill Bits Counterbores and Countersinks Hand and Machine, 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 R89CO 50. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.