The Muncie 19900387000 is a Securing Tab (also referenced as a Locking Tab) used in Muncie SS66-Series and SS88-Series power takeoffs. In the SS66 Series illustrated parts list, this tab is specifically noted for use on the 21-position only. As a genuine Muncie replacement component, it maintains correct retention of the indexed or shifted position within the PTO assembly. Pro Gear and Transmission carries this part for fleet shops and mechanics servicing Muncie SS66 and SS88 Series PTOs. Not sure this is the right part for your unit? Give us a call to confirm proper fit before ordering.FeaturesGenuine Muncie Securing Tab, part number 19900387000Fits Muncie SS66-Series PTO (21 position only, per manufacturer parts list)Also listed in the Muncie SS88-Series parts manualRetains correct indexed position within the PTO assemblyDirect OEM replacement component for Muncie SS-Series unitsTech SpecsApplication: Muncie SS66-Series PTO (21 position only) and SS88-Series PTOPart Type: Securing Tab (Locking Tab)Manufacturer Part Number: 19900387000Used in these Muncie PTO modelsSS66 SeriesSS88 SeriesSSH SeriesSSV Series