Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS4271-2S8 found under Mounting Base Tiedown Electrical by Boeing Company The. The National Stock Number assigned to this part is 5975011775688, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HS4271-2S8.