Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1157-2017-V28 557 found under by S A S Industries Inc. The National Stock Number assigned to this part is 5331016952499, 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 1157-2017-V28 557.