Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 763-8558-001 found under Gearshaft And Beari by Standard Grinding And Manufacturing. The National Stock Number assigned to this part is 3040009868841, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 763-8558-001.