Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1-025008 ITEM NO.55 found under Ring Retaining by Western Sky Industries Inc. The National Stock Number assigned to this part is 5325014564305, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D1-025008 ITEM NO.55.