Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 247E157-5 247E257-5 found under Bolt by Kapl Inc. The National Stock Number assigned to this part is 4470000517608, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 247E157-5 247E257-5.