Please fill out the form below for Piston Power and get a quote for part number 6L3993 by Holt Bros with NSN 2990003469030 and FSC Name is 2990 Miscellaneous Engine Accessories Nonaircraft, 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 6L3993. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.