Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D 20027 A DN400 ITEM 5 found under Bearing Sleeve by Wouter Witzel Ltd. The National Stock Number assigned to this part is 3120171107473, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D 20027 A DN400 ITEM 5.